1.

Setae help in locomotion in earthworm but are not uniformly present in all the segments. They are present inA. `1^(st)` segmentB. last segmentC. Clitellar segmentD. `20^(th)-22^(nd)` segment

Answer» Correct Answer - D
In each by segment of earthworm, except the first, last and clitellum, there are rows of setae embedded in the epidermal pits in the middle of each segment.


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