Chapter 2 Part 3: 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="primaryvery-short-answer-type-questionsprimary-2"><Primary>Very Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong></p>
<p><img alt="alt text" src="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/519d374d-4ee2-4f69-8123-8c44beb8ed00/public"> The diploid Megaspore Mother Cell (MMC) undergo meiosis and forms a linear tetrad of four haploid megaspores.</p>
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<li>Three mitotic divisions, inside the functional (one) megaspore form the embryo sac (eight haploid nuclei), while the other three megaspores degenerate.</li>
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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>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primaryvery-short-answer-type-questionsprimary-3"><Primary>Very Short Answer Type Questions</Primary></h4>
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<p>The embryo sac is a seven-celled and eight nucleated structure.</p>
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<p>Three <strong>micropylar</strong>, Three <strong>chalazal</strong> and one <strong>central</strong>.</p>
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<p>The three micropylar cells are collectively known as egg-apparatus, which, consists of two <strong>synergids</strong> and one egg cell.</p>
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<p>While three chalazal cell form antipodal cell.</p>
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<p>The central cell is in the form of two nucleated cell till the fertilisation occurs and called as polar nuclei.</p>
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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>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primaryvery-short-answer-type-questionsprimary-14"><Primary>Very Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> Pistil is the female reproductive organ that receives pollen to fertilise the egg located in ovary.</p>
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<li>A pistil has three parts, i.e., <strong>stigma</strong> (receives pollen), which grows down through <strong>style</strong> to <strong>ovary</strong>.</li>
<li>Ovary contains ovules, which contain an egg.</li>
<li>The ovary develops into the fruit and ovule develops into a seeds.</li>
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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>Sexual Reproduction in Flowering Plants</b></font></Success>
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<h4 id="primaryshort-answer-type-questionsprimary-3"><Primary>Short Answer Type Questions</Primary></h4>
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<p><strong>Ans.</strong> A bisexual chasmogamous flower can evolve the following (three) strategies to prevent self-pollination (autogamy).</p>
<p>(a) <strong>Dichogamy</strong> In this mechanism, pollen release and stigma receptivity are not synchronised.</p>
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<li>In sunflower, the pollen is released before the stigma becomes receptive (protandry).</li>
<li>In Datura, Solanum, the stigma becomes receptive much before the release of pollen (protogyny) leads to cross-pollination.</li>
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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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