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Q.

The phenomenon of karyogamy is seen in which one of the following structures of angiosperms prior to fertilization?

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a

Central cell

b

Megaspore mother cell

c

Microspore mother cell 

d

Pollen tube 

answer is A.

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Detailed Solution

In the central cell, in some cases, the two polar nuclei fuse and form secondary nucleus. This fusion of polar nuclei in central cell is called karyogamy.

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