In all deuterostomes,by contrast,the cells divide parallel to and at right angles to the polar axis.This pattern is called radial cleavage.
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Q9: Protostomes develop through
A)spiral cleavage.
B)radial cleavage.
C)axial cleavage.
D)polar cleavage.
E)protocleavagE.
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Q18: Of the following combination of statements about
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