First slide
Angiosperms
Question

This cell of embryo sac shows the transformation into diploid cell from haploid cell prior to fertilisation.

Moderate
Solution

During the development and maturation of embryosac of angiosperms the central cell is initially haploid and dikaryotic with two polar nuclei. These polar nuclei fuse and form diploid secondary nucleus. Hence the haploid central cell becomes diploid and monokaryotic.

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