Based on the Findings of Hansen, Which Statement About Marine

question 34

Multiple Choice

Based on the findings of Hansen, which statement about marine gastropods is true?

• A) The average geographic range of direct-developing species is larger than that of species with swimming larval stages.
• B) The average geographic range of direct-developing species is smaller than that of species with swimming larval stages.
• C) According to the fossil record, species with swimming larvae were more prone to extinction than direct-developing species.
• D) According to the fossil record, species with swimming larvae had smaller geographic ranges and were therefore less prone to extinction.

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