Biology
All organisms in group 2(birds, fish, mammals, echinoderms, amphibians) except _______ are thought to share a common ancestor that possessed many of the same characterisitcs as the modern lancelets.
A)echinoderms
B)fish
C)amphibians
D)birds
E)mammals
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Answers
Answer: A) echinoderms. Echinoderms are thought to have a separate evolutionary history from other organisms in group 2, due to the body plan of echinoderms being much different from that of the other organisms in group 2.
