Question

what do you understant by spiral cleavage?
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Answer 1

Answer:

We Understand By Spiral Cleavage That  Spiral cleavage can vary between species, but generally the first two cell divisions result in four macromeres, also called blastomeres, (A, B, C, D) each representing one quadrant of the embryo. When viewed from the animal pole, this arrangement of cells displays a spiral pattern.