In the history of animals,which characteristic arose after the evolution of the cnidarians?
A) Alternation between polyp and medusa
B) Three distinct body layers
C) Nematocysts
D) Gastrovascular cavity
E) Planula larva
Correct Answer:
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Q30: Which feature is not associated with the
Q31: Which group includes the fewest species?
A) Mollusks
B)
Q32: The cnidarians are considered to be the
Q33: Many lineages of lophotrochozoans have a free-living
Q34: Which statement about nematocysts is true?
A) They
Q36: Which is a cnidarian group of geological
Q37: Which characteristic is not a feature of
Q38: Which feature is not a characteristic of
Q39: Which taxon has the largest number of
Q40: Which characteristic is not a feature of
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