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Question
Which of the following options has only diploid structures with respect to flowering plants?
Which of the following options has only diploid structures with respect to flowering plants?
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Solution
The correct option is B Zygote, central cell, nucellus
In option A, only megaspore mother cell or MMC is diploid. Microspore is formed after the meiotic division of pollen mother cell or PMC. Hence, it is haploid.
Endosperm, on the other hand, is a triploid nutritive tissue.
In option B, all the structures are diploid.
Central cell has two haploid polar nuclei which makes it a homodiploid cell in most of the angiosperms.
Zygote is formed by the fusion of haploid male and female gamete, hence it is diploid.
Nucellus is a diploid nutritive tissue present inside the ovule.
In option C, only PMC is diploid. Primary endosperm nucleus or PEN is triploid and polar nuclei are haploid.
In option D, megaspore mother cell (MMC) and integuments are diploid and endosperm is a triploid structure.
In option A, only megaspore mother cell or MMC is diploid. Microspore is formed after the meiotic division of pollen mother cell or PMC. Hence, it is haploid.
Endosperm, on the other hand, is a triploid nutritive tissue.
In option B, all the structures are diploid.
Central cell has two haploid polar nuclei which makes it a homodiploid cell in most of the angiosperms.
Zygote is formed by the fusion of haploid male and female gamete, hence it is diploid.
Nucellus is a diploid nutritive tissue present inside the ovule.
In option C, only PMC is diploid. Primary endosperm nucleus or PEN is triploid and polar nuclei are haploid.
In option D, megaspore mother cell (MMC) and integuments are diploid and endosperm is a triploid structure.
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