Which of these molluscs sometimes do not have an exterior shell?

A) gastropods only
B) bivalves only
C) cephalopods only
D) gastropods and cephalopods


Answer: D

Biology & Microbiology

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In addition to the shift to bipedalism, what major trend or trends do we see in hominin evolution as we look across our entire fossil record? Select all that apply

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Which of the following syndromes may result from infection by an arthropod-borne virus?

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Which of the following groups of microorganisms is not found among the normal gut microbiota?

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