Pre-fertilisation : Structures and Events
Question
The number of mitotic generations required to produce a mature embryo sac in most of the angiosperms is
Easy
Solution
The nucleus of the functional megaspore divides mitotically to form two nuclei which move to the opposite poles, forming the 2-nucleate embryo sac. Two more sequential mitotic nuclear divisions result in the formation of the 4-nucleate and later the 8-nucleate stages of the embryo sac.
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