In earthworms, what do the nerve cord, the setae, the circular muscles, and the metanephridia have in common?

A. They are serially repeated in the body segments of the body.
B. They are all used in locomotion.
C. They all play a role in excretion of waste from the body.
D. They all play a role in the reproductive activities of the earthworm.


A. They are serially repeated in the body segments of the body.

Biology & Microbiology

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