A) fertilisation of egg cell by two male gametes
B) fertilisation of egg cell and a central cell by two male gametes brought by same pollen tube
C) fertilisation of egg cell and a central cell by two male gametes brought by different-pollen tube
D) fertilisation of two egg cells by two male gametes brought by same pollen tube
Correct Answer: B
Solution :
During the process of sexual reproduction in flowering plants, double fertilisation involve fusion of one male gamete with egg cell and form zygote and the other with secondary nucleus (2n) to form triploid endosperm. A mature female gametophyte contain antipodal cells (3), two polar nuclei in center (secondary nucleus), and egg apparatius (3 nuclei) contain one egg. Hence, double fertilisation involve fertilisation of egg cell (one in number) and a central cell (secondary nucleus) by two male gametes brought about by same pollen tube.
You need to login to perform this action.
You will be redirected in
3 sec
