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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12001250

With a neat diagram explain the 7-celled, Eight nucleate mature female gametophyte.

Solution
Structure of mature female gametophyte
1. The mature female gametophyte is 7-celled (An egg, two synergids, three antipodals and a central cell).

2. Out of 7 cells of mature female gametophyte, the egg cell fuses with male gamete to form zygote, one synergid degenerates and the other synergid directs the pollen tube entry, the central cell fuses with the male gamete to form triploid primary endosperm nucleus and the three antipodals degenerate before or after fertilization.