Question

Double fertilisation involves

• A. fertilisation of the egg by two male gametes
• B. fertilisation of two eggs in the same embryo sac by two sperms brought by one pollen tube
• C. fertilisation of the egg and the central cell by two sperms brought by different pollen tubes
• D. fertilisation of the egg and the central cell by two sperms brought by the same pollen tube

Answer 1

Answer: (D)

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.