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a
The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the embryo.
b
Most zygotes divide only after certain amount of endosperm is formed.
c
Filiform apparatus present at the micropylar part of the synergids guides the entry of egg inside embryo sac from the nucellus.
d
Study of developement of embryo is called palynology
answer is B.
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Detailed Solution
Most zygotes divide only after certain amount of endosperm is formed. This is an adaptation to provide assured nutrition to the developing embryo.The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm.Filiform apparatus present at the micropylar part of the synergids guides the entry of pollen tube into embryo sac.Study of development of embryo is called embryology.