<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li><strong>Dispersal</strong> an individual is dispersed at one or another time during their life in a population which is revealed by immigration or emigration.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-1"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(i) <strong>Immigration</strong> is the number of individuals of the same species that have come into the habitat from elsewhere during a specified time period.</p> <p>(ii) <strong>Emigration</strong> is the number of individuals of the population who exit or leave the habitat and go elsewhere during a specified time period.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-2"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p><strong>Biotic Potential</strong> Biotic potential is the natural capacity of a population to increase its size under ideal environmental conditions.</p> </li> <li> <p><strong>Gene pool</strong> All the genotypes of all individuals in a breeding population is referred to as gene pool.</p> </li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-3"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> The following diagrams are the age pyramids of different populations.</p> <ul> <li>Comment on the status of these poulations.</li> </ul> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-239.jpg?height=249&width=273&top_left_y=859&top_left_x=332"></p> <p>A</p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-4"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-239.jpg?height=266&width=180&top_left_y=863&top_left_x=623"></p> <p>B</p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-5"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-239.jpg?height=266&width=517&top_left_y=861&top_left_x=833"></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-6"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> <strong>Figure A</strong> It is a ‘pyramid’ shaped age pyramid.</p> <ul> <li>In this figure, the base, i.e., pre-reproductive stage is very large as compared with the reproductive and post-reproductive stages of the population.</li> <li>This type of age structure indicate that the population would increase rapidly.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-7"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li><strong>Figure $\mathbf{B}$</strong> It is an ‘inverted bell’ shaped pyramid.</li> <li>In this figure, the pre-reproductive and reproductive stages are same.</li> <li>This type of age structure indicates that the population is stable.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-8"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Figure $\mathbf{C}$</strong> It is ‘urn’ shaped pyramid.</p> <ul> <li>In this figure, the pre-reproductive and reproductive stages are less than the post-reproductive stages of this population.</li> <li>In this population more older people are present.</li> <li>This type of age structure indicates that the population definitely is declining.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-9"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Comment on the growth curve given below.</p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-10"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-239.jpg?height=520&width=676&top_left_y=1674&top_left_x=502"></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-11"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The growth curve shown above is logistic growth curve or S-shaped curve.</p> <ul> <li>Logistic growth curve is considered more realistic because unlimited resources are not available in an ecosystem or in a habitat, where</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-12"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>$K$-stands for carrying capacity.</p> </li> <li> <p>$\mathrm{N}$-indicates population density, which is the number of species of a population per unit area.</p> </li> <li> <p>$r$-is for intrinsic rate of natural increase.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-13"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> A population of Paramecium caudatum was grown in a culture medium.</p> <ul> <li>After 5 days the culture medium became overcrowded with Paramecium and had depleted nutrients.</li> <li>What will happen to the population and what type of growth curve will the population attain?</li> <li>Draw the growth curve.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-14"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Initially, after a lag phase, the population will grow in an exponential manner as the nutrients and space will be abundant.</p> <ul> <li>When the food sources get depleted, the population density starts decreasing and ends in an asymptote phase, then the population density reaches the carrying capacity (maximum number of individuals of a population or species that a given environment can sustain indefinitely).</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-15"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>The population shows a pattern of logistic growth giving an S-shaped curve.</p> </li> <li> <p>Where $K=$ carrying capacity</p> </li> <li> <p>$N=$ population density at time ’ $t$ '</p> </li> <li> <p>$r=$ Intrinsic rate of natural increase</p> </li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-16"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-240.jpg?height=559&width=693&top_left_y=1205&top_left_x=486"></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-17"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Discuss the various types of positive interactions between species.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-18"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The interspecific interaction are of three types positive or beneficial, negative or antagonistic and last neutral interaction.</p> <ul> <li>Some positive interactions are scavenging, commensalism, protocooperation and mutualism.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-19"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li><strong>Mutualism</strong> This interaction confers benefits on both the interacting species, e.g.,</li> </ul> <p>(i) Lichens represent an intimate mutualistic relationship between a fungus and photosynthesising algae or cyanobacteria.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-20"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(ii) The mycorrhizae are associations between fungi and the roots of higher plants.</p> <ul> <li>The fungi help the plant in the absorption of essential nutrients from the soil while the plant in turn provides the fungi with energy-yielding carbohydrates.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-21"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(iii) Plants offer nectar, juicy and nutritious fruits to animals that help pollinate their flowers and disperse their seeds.</p> <ul> <li><strong>Commensalism</strong> This is the interaction in which one species benefits without affecting the other, e.g.,</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-22"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(i) An orchid growing as an epiphyte on a mango branch.</p> <p>(ii) Barnacles growing on the back of a whale.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-23"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(iii) The cattle egret foraging close to the cattle that stir up and flush out insects from the vegetation.</p> <p>(iv) Sea anemone that has stinging tentacles and the clown fish that lives among them to get protection from predators.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-24"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p><strong>Scavenging</strong> is the act of feeding by scavenger like bacteria, fungi on the remain of dead animals.</p> </li> <li> <p><strong>Protocooperation</strong> in the type of relationship in which both partners mutually obtain benefits.</p> </li> <li> <p>But they associate purely to benefit from each other and can live without each other.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-25"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons.</p> <ul> <li>As per the Gause’s principle, one of the species is to be eliminated in due course of time, but both are surviving well in the aquarium.</li> <li>Give possible reasons.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-26"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Competition is a rivalry relationship between two or more organisms.</p> <ul> <li>A competition between individual of same species (intraspecific) is more acute than the competition between individual of different species as all the members in a intraspecific competition have same basic requirements like food, water, light, space, mating and shelter.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-27"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li> <p>But this is true only when resources are limited.</p> </li> <li> <p>According to Gause’s principle, one of the species is to be eliminated.</p> </li> <li> <p>But studies recently have revealed that species facing intraspecific competition may evolve mechanism to pencourage co-existence rather than exclusion.</p> </li> <li> <p>This can also be done by a method known as ’ resource partitioning’.</p> </li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-28"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> While living in and on the host species, the animal parasite has evolved certain adaptations.</p> <ul> <li>Describe these adaptations with examples.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-29"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Parasites have evolved special adaptations such as</p> <p>(i) The loss of unnecessary sense organs as in lice, mites and fleas don’t have wings.</p> <p>(ii) Presence of adhesive organs or suckers to cling on to the host-in tapeworms and leeches.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-30"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(iii) Loss of digestive system i.e., tapeworm.</p> <p>(iv) High reproductive capacity i.e., roundworm produces large progeny.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-31"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Do you agree that regional and local variations exist within each biome?</p> <ul> <li>Substantiate your answer with suitable example.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-32"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> A biome can be define as the large communities of the world and shows that area with similar climate have communities of same type.</p> <ul> <li>Climate is the main factor that determine the type of soil which in turn determines the type of vegetation.</li> <li>The type of vegetation and climate together determine the kind of microorganisms and animals.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-33"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li>The other determining factors are latitude and altitude, intensity and duration of winter and summer days, water mass and topography.</li> <li>The main biome of the world does not show boundary of any country and regional and local variations exist in each biome.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-34"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li>E.g., temperate deciduous forest receive an annual precipitation between 75-150 cm and tropical rain forest show a rainfall above $140 \mathrm{~cm} / \mathrm{yr}$ which may reach upto $400 \mathrm{~cm} / \mathrm{yr}$.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-35"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Which element is responsible for causing soil salinity?</p> <ul> <li>At what concentration does the soil become saline?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-36"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <font size ="6"> <p><strong>Ans.</strong> Soil salinity is the salt content in soil, which is caused by improper irrigation.</p> <ul> <li> <p>The process of increasing salt content is termed as salinisation.</p> </li> <li> <p><strong>Causes of Soil Salinity</strong> The high salt concentration of soil is caused by improper irrigation method from a salt laden water table.</p> </li> <li> <p>When salt concentration in soil is increased, than it get accumulated due to evaporation.</p> </li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-37"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li>Human activities like fertilising crop is also responsible for salinity of soil.</li> <li>As fertiliser contain potassium, which can form a naturally occuring salt-sylvite.</li> <li>Salinity of soil degrades soil and vegetation.</li> <li>Normally the $\mathrm{pH}$ value of soil comprises between 2.2-9.7, while above which the soil is degrading by salt content.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-38"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Does light factor affect the distribution of organisms?</p> <ul> <li>Write a brief note giving suitable examples of either plants or animals.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-39"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Plants require sunlight for photosynthesis.</p> <ul> <li>Therefore, light is an important factor that affects the distribution of plants, e.g.,</li> </ul> <p>(i) Many species of small plants (herbs and shrubs) growing in forests are adapted to photosynthesise optimally under very low light conditions so they will be seen distributed in shady areas under tall, canopied trees.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-40"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(ii) Many plants in the shade will grow vertically to gain access to light.</p> <ul> <li>These plants will appear to have smaller leafs and smaller than others of the same species of the same age found in conditions with better sunlight.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-41"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(iii) Large sized trees will be present in areas that get abundant sunlight.</p> <p>(iv) Plants dependent on sunlight to meet their photoperiodic requirements for flowering, will try to be distributed in area, where this requirement is being met for their reproductive success.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-42"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Give one example for each of the following</p> <p>I. Eurythermal plant species</p> <p>II. A hot water spring organism</p> <p>III. An organism seen in deep ocean trenches</p> <p>IV. An organism seen in compost pit</p> <p>V. A parasitic angiosperm</p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-43"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>VI. A stenothermal plant species</p> <p>VII. Soil organism</p> <p>VIII. A benthic animal</p> <p>IX. Antifreeze compound seen in antarctic fish</p> <p>$X$. An organism which can conform</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-44"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> I. Mango, Acacia</p> <p>II. Archaebacteria</p> <p>III. Jelly fishes</p> <p>IV. Earthworm</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Organisms and Populations</b></font></Success> </div> <h4 id="primarylong-answers-type-questionsprimary-45"><Primary>Long Answers Type Questions</Primary></h4> <hr> <div class="text-container"> <p>V. Cuscuta</p> <p>VI. Cocos nucifera</p> <p>VII. Bacteria</p> <p>VIII. Octopus</p> <p>IX. Salt content (osmotic regulation)</p> <p>X. All plant and fish like large mouth bass (temperature conformer)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ <span style="color:blue">Long answer type questions</span> </div> </font>