Question

the secondary nuclei form a polar nuclei prior to fertilisation . state true or false

Answer 1

Embryo sac in flowering plants is a haploid multicellular structure which contain eight nuclei.

Diploid megaspore mother cell undergo meiosis and produce 4 haploid megaspores, out of which 3 degenerate and only one remain functional and become enlarged in each ovule. It is called embryo sac$.$

The haploid nucleus of embryo sac undergo 3 mitotic division to produce eight nuclei.

• Two haploid polar nuclei present in the centre fuse to form diploid secondary polar nucleus.

• Three nuclei present at the chalazal end form antipodal cells.

• Three nuclei present at the micropylar end are organised to form egg apparatus.

Answer

true