Question

What are the cells of the mature embryo sac of angiosperms

Answer 1

They are called polar nuclei. The remaining three nuclei form cells at the two ends, three celled egg apparatus at the micropylar end and three antipodal cells at the chalazal end. The middle binucleate structure organises itself into a central cell. The female gametophyte in angiosperms is called the embryo sac.

Answer 2

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The embryo sac or female gametophyte of angiosperm contains 3 celled egg apparatus, 3 antipodal cells and two polar nuclei (secondary nucleus or central cell) at the centre of structure.