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Question

Ventral surface of mature earthworm can be distinguished from dorsal surface by -

A
Presence of clitellum
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B
None of these
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C
Presence of mid-dorsal line
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D
Presence of genital pores
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Solution

The correct option is D Presence of genital pores
Earthworms have long cylindrical body. The ventral surface is distinguished by the presence of genital openings (pores).The dorsal surface of the body is marked by a dark median mid-dorsal line (dorsal blood vessel) along the longitudinal axis of the body.
Hence, option C is correct.

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