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Q.

Which of the following pair of structures of angiospermic plant has triploid condition ?

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a

Megaspore mother cell and secondary nucleus

b

PEN and cells of nucellus

c

Cells of endosperm and PEN

d

Cells of endosperm and synergids

answer is C.

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Detailed Solution

One of the male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus (PEN). The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm.

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