Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).
Assertion (A) : During embryo sac formation mitotic divisions are initially strictly free nuclear.
Reason (R) : During embryo sac development, nuclear divisions are not followed immediately by cell wall formation.
In light of the above statements, choose the correct answer from the options given below.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

(A) is true but (R) is false.

Both (A) and (R) are false.

Both (A) and (R) are true but (R) is not the correct explanation of (A).

answer is A.

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Detailed 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.
It is of interest to note that these mitotic divisions are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation.
After the 8-nucleate stage, cell walls are laid down, leading to the organization of the typical female gametophyte or embryo sac.

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