A 500-million-year-old fossil from the Cambrian shows what appears to be a two mirror images of a marine invertebrate.This animal is likely an ancestral _______.
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A) are a polyphyletic group.
B) all
Q226: The stage of the life cycle of
Q227: Which characteristic of bryozoans would indicate that
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A) have eyes.
B) have anterior
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A) thrive in dry environments.
B) are
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A) float in the plankton.
B) secrete
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A) were once suspected to be
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