Chapter 2: Sexual Reproduction in Flowering Plants

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<Success><font size="5"><b>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-11"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is</p>
<p>(i) The calyx, a whorl of sepals (outermost).</p>
<p>(ii) The corolla, a whorl of petals (inside the calyx).</p>
<p>(iii) The androecium, a whorl of stamens (inside the corolla).</p>
<p>(iv) The gynoecium, a whorl of pistils (in the centre of the flower forming inner most whorl).</p>
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<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
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<Success><font size="5"><b>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-26"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> The gynoecium represents the female reproductive part of the flower and consists of pistil.</p>
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<p>Each pistil has three parts, i.e., <strong>stigma</strong>, <strong>style</strong> and <strong>ovary</strong>.</p>
</li>
<li>
<p>Inside the ovarian cavity, the <strong>placenta</strong> is located.</p>
</li>
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<p>Arising from the placenta there are the megasporangia, commonly called <strong>ovules</strong>.</p>
</li>
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<p>The functional megaspore undergoing the meiotic division develops into the female gametophyte or <strong>embryo sac</strong>.</p>
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<p><Success>Sol. to be continued</Success></p>
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<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
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</font>

<div style='text-align : center'>
<Success><font size="5"><b>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-37"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> The female gametophyte or embryo sac is located inside the nucellus, enclosed within the integuments.</p>
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<li>In a majority of flowering plants, one of the megaspore is functional while the other three degenerate.</li>
<li>Three repeated mitotic divisions of the functional megaspore results in the formation of <strong>seven-celled</strong> or <strong>eight-nucleate</strong> embryo sac.</li>
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<p><Success>Sol. to be continued</Success></p>
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<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>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-42"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> Autogamy is a method of self-pollination in which the stigma of a flower receive pollens from the anther of same flower.</p>
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<p>For autogamy both sex organs of a chasmogamous flower should mature at the same time.</p>
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<p>As chasmogamous flowers open at maturity, pollen release and stigma receptivity should be synchronised for the process of autogamy.</p>
</li>
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<p><Success>Sol. to be continued</Success></p>
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<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>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-47"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> The pollination that occurs in opened flowers is called chasmogamy.</p>
<ul>
<li>It is the most common type of pollination in all types of flowers.</li>
<li>Chasmogamy is of two types i.e., <strong>self-pollination</strong> (autogamy) and <strong>cross-pollination</strong>.</li>
<li>Cross-pollination is of two types i.e., <strong>geitonogamy</strong> and <strong>xenogamy</strong>.</li>
</ul>
<p><Success>Sol. to be continued</Success></p>
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<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
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<div style='text-align : center'>
<Success><font size="5"><b>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primarymultiple-choice-questions-mcqsprimary-52"><Primary>Multiple Choice Questions (MCQs)</Primary></h4>
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<p><strong>Sol.</strong> Plants use two abiotic (wind and water) and one biotic (animals) agent to achieve pollination.</p>
<ul>
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<p>Majority of plants use biotic agents for pollination.</p>
</li>
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<p>Pollination by wind is more common amongst abiotic pollination.</p>
</li>
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<p>Wind pollination requires the light and non-sticky pollen grains so that, they can be transported in wind currents.</p>
</li>
</ul>
<p><Success>Sol. to be continued</Success></p>
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<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>