A) fertilization of the egg by two male gametes
B) fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube
C) fertilization of the egg and the central cell by two sperms brought by different pollen tubes
D) fertilization of the egg and the central cell by two sperms brought by the same pollen tube
Correct Answer: D
Solution :
Double fertilization is the unique feature of flowering plants, whereby, from a single pollen grain, the two generative nuclei within the pollen tube fuse with different nuclei within the embryo sac of the ovule. Fusion of one sperm with egg cell nucleus forms zygote and the fusion of other sperm with diploid secondary nucleus forms triploid primary endosperm nucleus.
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