Question

Setae occur in earthworm in all segments except

• A. Clitellar region
• B. Anal segment
• C. Peristomium
• D. All of the above

Answer 1

The correct option is D All of the above

In Earthworm, each body segment, except the first, last and clitellum, there are rows of S-shaped setae, embedded in the epidermal pits in the middle of each segment. Setae can be extended or retracted. Their principal role is in locomotion. Hence setae occur in Earthworm in all segments except clitellar region, anal segment, and peristomium.

So the correct answer is 'All of the above'.