An important role of burrowing animals is:
A) reducing detritus in the sediment.
B) maintaining the structure of marine sediments.
C) nutrient cycling.
D) circulating water near the bottom.
Correct Answer:
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Q26: Epitokes of polychaetes are:
A) feeding structures.
B) respiratory
Q27: The opening of the shells of some
Q28: What do shipworms and a peanut worms
Q29: Most bivalves are:
A) predators.
B) parasites.
C) filter feeders.
D)
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Q34: The following phylum is characterized by having
Q35: The valves of bivalves are closed by
Q36: The sipunculid worms are also called:
A) peanut
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