One very special feature in the earthworm (Pheretima) is that (A) fertilization of eggs occurs i...

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One very special feature in the earthworm (Pheretima) is that
(A) fertilization of eggs occurs inside the body
(B) the typhlosole greatly increases the effective absorption area of the digested food in the intestiné
(C) the S-shaped setae embedded in the integument are the defensive weapons used against the enemes
(D) it has a long dorsal tubular heart.
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