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Question

The embryo sac of angiosperms is made up of ___


A

8 cells with 7 nuclei

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B

7 cells with 8 nuclei

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C

6 cells with 12 nuclei

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D

7 cells with 6 nuclei

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Solution

The correct option is B

7 cells with 8 nuclei


The female gametophyte or embryo sac of an angiosperm has 7 cells and 8 nuclei. The megaspore mother cell undergoes mitosis to form two nuclei which migrate to opposite poles, forming a 2-nucleate embryo sac. Further mitotic divisions lead to the formation of 4-nucleate followed by 8-nucleate stages of the embryo sac. In these mitotic divisions, nuclear division is not followed by cell division.


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