<div> <h4 id="successchaptersuccess"><Success>Chapter</Success></h4> <h4 id="successorganisms-and-populationssuccess"><Success>Organisms and Populations</Success></h4> </div>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <div> <h4 id="primarymultiple-choice-questions-mcqsprimary"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> </div>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-1"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Autecology is the</p> <p class="fragment">(a) Relation of a population to its environment <br> (b) Relation of an individual to its environment <br> (c) Relation of a community to its environment <br> (d) Relation of a biome to its environment </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-2"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Thinking Process</strong></p> <ul> <li>Ecology is study of the relationship of living organisms with their abiotic and biotic components.</li> <li>It consists of two branches.</li> </ul> <p>(i) Autecology</p> <p>(ii) Synecology</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-3"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-4"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Autecology is the study of relationship of an individual other options are irrelevant to its environment.</p> <ul> <li>So, the relation of a population or community to its environment is called synecology.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-5"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Ecotone is</p> <p class="fragment">(a) A polluted area <br> (b) The bottom of a lake <br> (c) A zone of transition between two communities <br> (d) A zone of developing community </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-6"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-7"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> The adjacent biotic (natural) communities, generally do not posses a fine demarcation edge or line between them.</p> <ul> <li> <p>The adjacent of two communities is represented by population of both the communities, and this transition zone between two communities is referred as <strong>ecotone</strong>.</p> </li> <li> <p>Rest of the options do not define ecotone (zone of transition).</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-8"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Biosphere is</p> <p class="fragment">(a) A component in the ecosystem <br> (b) Composed of the plants present in the soil <br> (c) Life in the outer space <br> (d) Composed of all living organisms present on earth which interact with the physical environment </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-9"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (d)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-10"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Biosphere is composed of all living organisms present on earth which interact with their physical environment.</p> <ul> <li> <p>In other words a biosphere or ecosphere term is collectively used for all the ecosystems of world.</p> </li> <li> <p>Ecosphere or biosphere can not be defind by other three options, as they represent only a part of ecosystem.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-11"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Ecological niche is</p> <p class="fragment">(a) The surface area of the ocean <br> (b) An ecologically adapted zone <br> (c) The physical position and functional role of a species within the community <br> (d) Formed of all plants and animals living at the bottom of a lake </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-12"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-13"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Ecological niche is ecologically adapted zone, i.e., the specific place of habitat occupied by individual of a species.</p> <ul> <li> <p>It in turn is determined by factors such as by its range of tolerance, i.e., the physical position and functional role of a species within the community, etc.</p> </li> <li> <p>Rest of the options are incorrect.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-14"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> According to Allen’s rule, the mammals from colder climates have</p> <p class="fragment">(a) Shorter ears and longer limbs <br> (b) Longer ears and shorter limbs <br> (c) Longer ears and longer limbs <br> (d) Shorter ears and shorter limbs </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-15"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (d)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-16"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> According to Allen’s rule, the mammals (endothermal animals) from colder climates or areas show shorter extremities like ears and limbs as compared to the mammals of warm region.</p> <ul> <li> <p>The shorter extermise of mammals in colder region help to minimise heat loss and maintian homestatis.</p> </li> <li> <p>Rest of the other options does not stand true for Allen’s rule.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-17"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Salt concentration (salinity) of the sea measured in parts per thousand is</p> <p class="fragment">(a) $10-15$ <br> (b) $30-70$ <br> (c) $0-5$ <br> (d) $30-35$ </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-18"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Thinking Process</strong></p> <ul> <li>Habitat of an organism is characterised by both abiotic component and biotic component.</li> <li>Abiotic components consists of temperature, water, light and soil.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-19"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (d)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-20"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Next to temprature water is an important abiotic component influencing the life of an organism/organisms.</p> <ul> <li>In an oceanic ecosystem, the organisms face water related problems like $\mathrm{pH}$, salinity of water.</li> <li>The salt concentration (salinity) of sea measured in parts per thousand is $30-35$</li> </ul> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-21"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>The other three options are incorrect.</p> </li> <li> <p><strong>Note</strong> The salinity (measured in parts per thousand) is less than 5 in land water, 30-35 in sea water and $>100$ do in some hypersaline water bodies like lagons.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-22"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Formation of tropical forests needs mean annual temperature and mean annual precipitation as</p> <p class="fragment">(a) $18-25^{\circ} \mathrm{C}$ and $150-400 \mathrm{~cm}$ <br> (b) $5-15^{\circ} \mathrm{C}$ and $50-100 \mathrm{~cm}$ <br> (c) $30-50^{\circ} \mathrm{C}$ and $100-150 \mathrm{~cm}$ <br> (d) $5-15^{\circ} \mathrm{C}$ and $100-200 \mathrm{~cm}$ </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-23"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (a)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-24"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Formation of that tropical forest need annual temperature $18-25^{\circ} \mathrm{C}$ and annual rainfall (precipitation) above $140 \mathrm{~cm}$, usually between $150-400 \mathrm{~cm}$ and reach upto $1000 \mathrm{~cm} /$ year.</p> <ul> <li>Tropical forest (tropical rain or evergreen forest mainly occurs in equatorial or subequatorial region like Amazon, Central America and Orinco and Congo river basins of South America and Africa respectively.</li> </ul> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-25"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>The other options are incorrect.</p> </li> <li> <p>Note The average mean temperature to form a tropical/subtropical rain forest is $17^{\circ} \mathrm{C}$ $25^{\circ} \mathrm{C}$ and climate is characterised by mild winter.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-26"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Which of the following forest plants controls the light conditions at the ground?</p> <p class="fragment">(a) Lianas and climbers <br> (b) Shrubs <br> (c) Tall trees <br> (d) Herbs </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-27"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-28"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> In a forest ecosystem, light is an important abiotic component that controls a number of life processes in organism.</p> <ul> <li>In forest, its intensity, duration and quality at ground is controlled by tall trees, which have higher productivity than shrubs and herbs growing underneath.</li> <li>Lianas and climber are woody vines which make commensalism association with tall trees.</li> <li>Herbs and shrubs occupies lower strata of forest.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-29"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <font size ="6"> <p><strong>Ques.</strong> What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?</p> <p class="fragment">(a) It will grow normally <br> (b) It will grow well because it is planted in the same locality <br> (c) It may not survive because of change in its micro climate <br> (d) It grows very well because the plant gets more sunlight </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-30"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-31"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> In a forest ecosystem tall trees of forest plants controls the light condition, i.e., intensity, duration and quality of light at the ground.</p> <ul> <li>A well growing herbaceous plant in forest receive less intensity, duration and quality of light, but when it is transplanted in a park outside its natural habitat, the light will be received uninterrupted.</li> </ul> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-32"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li>So due to change in its microclimate, it may not survive.</li> <li>Rest of the other options are incorrect to depict the fate of plant.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-33"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> If a population of 50 Paramecium present in a pool increases to 150 after an hour, what would be the growth rate of population?</p> <p class="fragment">(a) 50 per hour <br> (b) 200 per hour <br> (c) 5 per hour <br> (d) 100 per hour </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-34"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Thinking Process</strong></p> <ul> <li>Population growth is the important characteristic of population, which is determined by addition and loss of individual.</li> <li>In case of higher addition of organisms/individual than lost, population show positive growth, i.e., vital index is more than 100.</li> <li>But when vital index is less than 100, population show negative growth.</li> </ul> <p><Success>Thinking process to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-35"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li>Population growth is controlled by interaction between three factors naturally; biotic potential, standing state and environmental resistance.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-36"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (d)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-37"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Biotic potential is the natural capacity of a population to multiply/increase at its maximum rate under favourable environmental conditions.</p> <ul> <li>Population of Paramecium show 100 per hour growth, i.e., two individuals are produced by one.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-38"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)?</p> <p class="fragment">(a) 100 <br> (b) 200 <br> (c) 50 <br> (d) 150 </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-39"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-40"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Growth rate is $200 \%$ as one organism is producing two individuals at a time.</p> <ul> <li>(Refer to Question number-10).</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-41"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> A population has more young individuals compared to the older individuals.</p> <ul> <li>What would be the status of the population after some years?</li> </ul> <p class="fragment">(a) It will decline <br> (b) It will stabilise <br> (c) It will increase <br> (d) It will first decline and then stabilise </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-42"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-43"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Variation in number of individuals in a population is expressed as population density and population size.</p> <ul> <li> <p>A population of more young individual than older individuals, will show positive growth in future (after some yrs), i.e., it will increase after some time.</p> </li> <li> <p>Rest of the options do not represent the correct status of population.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-44"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What parameters are used for tiger census in our country’s national parks and sanctuaries?</p> <p class="fragment">(a) Pug marks only <br> (b) Pug marks and faecal pellets <br> (c) Faecal pellets only <br> (d) Actual head counts </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-45"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-46"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> The parameters used for tiger census in our country’s national park and sanctuaries are foot prints (pug marks) and faecal pallets of conserved animals.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-47"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Which of the following would necessarily decrease the density of a population in a given habitat?</p> <p class="fragment">(a) Natality > mortality <br> (b) Immigration > emigration <br> (c) Mortality and emigration <br> (d) Natality and immigration </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-48"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-49"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Population growth means increase in its size and is determined by addition and loss of individual in a population.</p> <ul> <li>Population density is the number of individuals present per unit volume/area at given time.</li> </ul> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-50"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>Thus, mortality and emigration would necessarily decrease the density of a population in a given habitat due to loss of individual result from mortality (deaths) and emigration.</p> </li> <li> <p>When natality rate will be more than mortality rate and increased immigration rate mould necessarily increase the density of a population.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-51"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> A protozoan reproduces by binary fission.</p> <ul> <li>What will be the number of protozoans in its population after six generations?</li> </ul> <p class="fragment">(a) 128 <br> (b) 24 <br> (c) 64 <br> (d) 32 </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-52"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (c)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-53"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Binary fission, a mode of asexual reproduction in protozoan produce two offsprings from parent individual.</p> <ul> <li>So</li> </ul> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-54"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <table> <thead> <tr> <th style="text-align:center">Single protozoan <br> (Ist generation)</th> <th style="text-align:center">$ \underset{\longrightarrow}{Multiplied} $</th> <th style="text-align:center">Two (2 individual)</th> <th style="text-align:center">(II)</th> <th></th> </tr> </thead> <tbody> <tr> <td style="text-align:center">4</td> <td style="text-align:center">$\rightarrow 8$</td> <td style="text-align:center">$\rightarrow 16$</td> <td style="text-align:center">$\rightarrow 32$ $\rightarrow 64$ Nos</td> <td></td> </tr> </tbody> </table> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-55"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <table> <thead> <tr> <th style="text-align:center">Single protozoan <br> (Ist generation)</th> <th style="text-align:center">$ \underset{\longrightarrow}{Multiplied} $</th> <th style="text-align:center">Two (2 individual)</th> <th style="text-align:center">(II)</th> <th></th> </tr> </thead> <tbody> <tr> <td style="text-align:center">$($ III $)$</td> <td style="text-align:center">(IV)</td> <td style="text-align:center">(V)</td> <td style="text-align:center">(VI)</td> <td></td> </tr> </tbody> </table> <ul> <li>Thus, the population of protozoan will be 64 , after six generations.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-56"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> In 2005 , for each of the 14 million people present in a country, 0.028 were born and 0.008 died during the year.</p> <ul> <li>Using exponential equation, the number of people present in 2015 is predicted as</li> </ul> <p class="fragment">(a) 25 millions <br> (b) 17 millions <br> (c) 20 millions <br> (d) 18 millions </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-57"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-58"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Exponential equation</p> <p>$$ \begin{aligned} d N / d t & =(b-d) \times N \\ d N / 10 & =(0.028-0.008) \times 14(0.020) \times 14 \\ d N / 10 & =.28 \\ d N & =.28 \times 10 \\ d N & =2.8 =14 \text { million }+2.8 \text { million } \\ & =16.8 \text { million }=17 \text { million } \end{aligned} $$</p> <p><Success>Sol. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-59"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li>So, the number of people present in 2015 is predicted as 17 millions.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-60"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Amensalism is an association between two species where</p> <p class="fragment">(a) One species is harmed and other is benefitted <br> (b) One species is harmed and other is unaffected <br> (c) One species is benefitted and other is unaffected <br> (d) Both the species are harmed. </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-61"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Thinking Process</strong></p> <ul> <li>Interspecific interactions in population arise from the interaction of populations of two different species.</li> <li>This could be beneficial, neutral or detrimental to one or both of the species.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-62"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-63"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <font size ="6"> <p><strong>Sol.</strong> When one species is benefitted and other is harmed, in an association between two species, it is called amensalism.</p> <ul> <li> <p>In commensalism one species is benefitted and other is unaffected.</p> </li> <li> <p>The other options are in correct because While in when one species is harmed and other is benefitted, the relationship is termed as parasitism.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>