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 female 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 gemetophyte \[(n)\], the latter by seed coat\[(2n)\]. In this way seed wontains three generations locked one within another. Of these, two generations occur within embryo.
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