The type of cleavage found in the zygote of Ascaris is

Spiral and determinate

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Holoblastic

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Meroblastic

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None of the above

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Solution

The correct option is A Spiral and determinate
In determinate cleavage, each early blastomere is destined to become a particular portion of the embryo. E.g., Ascaris and some tunicates.
In spiral cleavage, the blastomeres are arranged in a spiral form around the vegetal axis. It is seen Ascaris, flatworms, annelids, molluscs and rotifers. Thus, the correct answer is option A.

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A zygote is completely divided into two by a cleavage furrow. This type of cleavage is________

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