Chapter 1 Part 3: Reproduction in Organisms

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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryvery-short-answer-type-questionsprimary-11"><Primary>Very Short Answer Type Questions</Primary></h4>
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<li>Note In several fungi and plants, terms such as <strong>homothallic</strong> and <strong>monoecious</strong> are used to denote the <strong>bisexual condition</strong> (male and female reproductive structures in the same plant) and <strong>heterothallic and dioecious</strong> are the terms used to describe <strong>unisexual condition</strong> (male and female reproductive structures on different plants).</li>
<li>But in animals, individuals are either male or female (unisexual) or possess both the reproductive organs (bisexual).</li>
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Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions
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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryvery-short-answer-type-questionsprimary-12"><Primary>Very Short Answer Type Questions</Primary></h4>
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<p><strong>Ques.</strong> Match the organisms given in column I with the vegetative propagules given in column II.</p>
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<th style="text-align:left">Column I</th>
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<th style="text-align:left">Column II</th>
<th style="text-align:left"></th>
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<td style="text-align:left">A.</td>
<td style="text-align:left">Bryophyllum</td>
<td style="text-align:left">1.</td>
<td style="text-align:left">Offset</td>
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<td style="text-align:left">B.</td>
<td style="text-align:left">Agave</td>
<td style="text-align:left">2.</td>
<td style="text-align:left">Eyes</td>
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<td style="text-align:left">C.</td>
<td style="text-align:left">Potato</td>
<td style="text-align:left">3.</td>
<td style="text-align:left">Leaf buds</td>
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<td style="text-align:left">D.</td>
<td style="text-align:left">Water hyacinth</td>
<td style="text-align:left">4.</td>
<td style="text-align:left">Bulbils</td>
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Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions
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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryvery-short-answer-type-questionsprimary-13"><Primary>Very Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> The correct matching is as follows</p>
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<th style="text-align:left">Column I   (Plant Angiosperms)</th>
<th style="text-align:center">Column II   (Vegetative Propagules)</th>
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<td style="text-align:left">A.</td>
<td style="text-align:left">Bryophyllum</td>
<td style="text-align:center">Leaf buds</td>
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<td style="text-align:left">B.</td>
<td style="text-align:left">Agave</td>
<td style="text-align:center">Bulbils</td>
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<td style="text-align:left">C.</td>
<td style="text-align:left">Potato</td>
<td style="text-align:center">Eyes</td>
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<td style="text-align:left">D.</td>
<td style="text-align:left">Water hyacinth</td>
<td style="text-align:center">Offset</td>
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<p><Success>Ans. to be continued</Success></p>
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Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions
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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryshort-answer-type-questionsprimary-11"><Primary>Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> Reduction division (meiosis) is associated with sexual reproduction.</p>
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<li>The reasons are</li>
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<p>(i) Since, sexual reproduction involves the fusion of two types of gametes male and female), they must have haploid number of chromosomes.</p>
<p>(ii) The cell (meiocyte) which gives rise to gametes often has diploid number of chromosomes and it is only by reducing the number by half that we can get haploid gametes.</p>
<p><Success>Ans. to be continued</Success></p>
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Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions
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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryshort-answer-type-questionsprimary-17"><Primary>Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> Fertilisation is not an obligatory event for fruit production in certain plants.</p>
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<p>Some fruits are developed from unfertilised ovary called parthenocarpic fruits.</p>
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<p>These are seedless fruits, such as pomegranate, grapes, etc.</p>
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<p>Flowers of these plants are sprayed by a growth hormone that induces fruit development even though fertilisation has not occurred.</p>
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<p>The ovules of such fruits, however, fail to develop into seeds.</p>
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Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions
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<Success><font size="5"><b>Reproduction in Organisms</b></font></Success>
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<h4 id="primaryshort-answer-type-questionsprimary-23"><Primary>Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> In an angiosperm flower, the post-fertilisation changes occur as follows</p>
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<th style="text-align:left">Sepal</th>
<th style="text-align:left">Fall off</th>
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<td style="text-align:left">Petal</td>
<td style="text-align:left">Fall off</td>
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<td style="text-align:left">Stamen</td>
<td style="text-align:left">Fall off</td>
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<td style="text-align:left">Zygote</td>
<td style="text-align:left">Embryo</td>
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<td style="text-align:left">Primary endosperm nucleus</td>
<td style="text-align:left">Endosperm (3n)</td>
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<p><Success>Ans. to be continued</Success></p>
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Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions
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