A) 100
B) 75
C) 125
D) 50
Correct Answer: C
Solution :
100 zygotes requires 100 pollen grains and 100 embryo sacs. 100 pollen grains are formed from 25 microspore mother cells while 100 embryo sacs are formed from 100 functional megaspores which in turn are produced by 100 megaspore mother cells since three out of four megaspores degenerate in each case. Hence, the correct option is (c).
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