Select the correct statement.

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(C) . Cleavage is a series of rapid mitotic cell divisions of the zygote that convert the single-celled zygote into a multicellular structure called a

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Cleavage is repeated mitotic division of zygote.

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(C) . Cleavage is a series of rapid mitotic cell divisions of the zygote that convert the single-celled zygote into a multicellular structure called a blastula.During cleavage,the total volume of the embryo remains constant,and there is no significant growth in the size of the cells; instead,the cytoplasm is partitioned into smaller cells called blastomeres.Option $A$ is incorrect because cleavage precedes gastrulation.Option $B$ is incorrect because the amount and distribution of yolk significantly influence the pattern and rate of cleavage.Option $D$ is incorrect because blastulation occurs before gastrulation.

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$A$: In the morula stage,the cells divide without any increase in size.
$R$: The zona pellucida remains intact until cleavage is completed.

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