Question

what do you mean by secondary nucleus?​

Answer 1

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what do you mean by secondary nucleus?

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The 2 polar nuclei in embryo sac fuse to form Secondary nucleus .

Hence, the ploidy level of secondary nucleus is 2n ( diploid )

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Answer 2

Secondary nucleus is also known as *definitive nucleus*. - The nucleus formed by the fusion of two polar nuclei in the embryo sac of a seed plant prior to fertilization is called primary endosperm nucleus.