Q. 45.0( 5 Votes )

Setae help in locomotion in earthworm but are not uniformly present in all the segments. They are present in
A. 1st segment

B. Last segment

C. Clitellar segment

D. 20th - 22nd segment

Answer :

Segmentation in earthworm is used for its locomotion and setae are the part of each segment which has the muscles needed for locomotion. It is present in all segments of the earthworm except in the 1st, last and clitellar segment. Thus, the correct answer is 20th-22nd segment since all the other options do not have setae.

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