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Question $44$ of $51$

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When division of the $zyz{g}^2$ reaches the eight$-$cell stage and the planes of cleavage of the upper four cells line up with those of the bottom four cells so that two tiers of calls

Question $44$ result, one directly above the other, the type of cleavage is called

direct cleavage.

spiral deavage.

indirect cleavage.

protostome cleavage.

radial cleavage.

Question $44$ ol $51$

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