Answer:
The primary endosperm cell divides repeatedly and forms a
triploid andosperm tissue. The cells of the tissue are filled with reserve
food materials and are used for nutrition of thedeveloping embryo.
Embryo develops at the micropylar end of
the embryo sac where zygote is situated. Mostzygotes divide only after certain
amount of endosperm is formed. This is anadaptation toprovide assured nutrition
to the developing embryo.
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