A) germinated pollen grain
B) embryo
C) unfertilized ovule
D) Seed
Correct Answer: B
Solution :
Seed develops from an ovule (consisting integument and nucellus) or megasporangium. Parts of ovule develop a haploid megaspore which grow into haploid female gametophyte. This gametophyte develops an egg or oospore. The latter is fertilized by a male gamete and develop into a zygote (2n). The zygote develops into an embryo or new sporophyte. The embryo (2n) is surrounded by female gametophyte (n), the latter by seed coat (2n). In this way seed contains three generations locked one within another. Of these, two generations occur within embryo.
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