A) zygote
B) secondary nucleus
C) chalazal polar nucleus
D) micropylar polar nucleus
Correct Answer: B
Solution :
Endosperm in angiosperm develops from fusion of secondary nucleus with male gamete. Secondary nucleus is diploid structure formed by fusion of haploid chalazal polar nucleus and haploid micropylar polar nucleus. Zygote is formed by fusion of male gamete with egg.
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