"Diploblastic" refers to ________ where _________.
A) fish and amphibians, cells divide in twos synchronously
B) sea stars and humans, development can proceed in two directions
C) birds and reptiles, the egg must be completely nourished within a shell
D) cnidarians and comb jellies, only two germ layers are formed
E) only mammals, advanced neural structures are formed
Correct Answer:
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