A) dipioid
B) triploid
C) haploid
D) polyploid
Correct Answer: B
Solution :
In angiosperms, the first male nucleus fuses with egg cells, this leads to a diploid structure, called zygote. This is known as syngamy, while the second male nucleus fuses with the diploid secondary nucleus and lead to a triploid structure called as primary endosperm nucleus. This process is known as triple fusion. Primary endosperm nucleus after several mitotic divisions gives rise to a nutritive mass called as endosperm so, it is a triploid structure. Syngamy and triple fusion together, are known as double fertilisation. It is as unique feature of angiosperms.
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