Which of the following segments of an earthworm lack setae?

first and last segments

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first segment and clitellum

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first segment

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first, clitellum and last segments

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Solution

The correct option is D first, clitellum and last segments
Setae are S-shaped structures present in the epidermal pits of the earthworm. They are present throughout the body of earthworm, except in the first, last and clitellar segments of earthworm. By the extension and retraction of setae, the earthworm can move. The primary role of setae is locomotion.

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Setae help in the locomotion in earthworm but are not uniformly present in all the segments. Select among the following that represents setae.

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