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Q.

A typical angiospermic embryo sac, at maturity is:

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a

7 celled and 8 nucleated

b

8 celled and 7 nucleated

c

8 celled and 8 nucleated

d

7 celled and 7 nucleated

answer is A.

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Detailed Solution

A typical angiospermic embryo sac, at maturity is 7 celled and 8 nucleated.
7 cells are :
3 antipodals, 2 synergids, 1 egg cell and a central cell.
Each of the 7 cells except central cell has 1 nucleus. Whereas the central cell has 2 polar nuclei. Therefore, the number of nuclei becomes 8.

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A typical angiospermic embryo sac, at maturity is: