In ovules of Angiosperms, which one of the following is not a haploid

In ovules of Angiosperms, which one of the following is not a haploid cell?

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Nucellus

Synergid

Egg

Antipodal

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UPSC CDS-2 – 2023

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The Nucellus in the ovule of Angiosperms is diploid.

The Angiosperm ovule contains the female gametophyte (embryo sac) surrounded by parental diploid tissue. The nucellus is the mass of parenchyma cells that makes up the body of the ovule, enclosing the embryo sac. It is derived from the sporophyte generation and is therefore diploid (2n). The embryo sac itself contains haploid cells like the egg cell, synergids, and antipodal cells, as well as a central cell which is typically diploid (formed by the fusion of two haploid polar nuclei).

The embryo sac develops from a haploid megaspore through mitosis. The egg cell, synergids (usually two), and antipodal cells (usually three) are all haploid (n). The central cell contains two polar nuclei, which fuse to form a diploid (2n) or polyploid nucleus depending on the species.

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