Q. Parapodia are present in

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Solution:

Aquatic annelids like nereis possess setae and lateral appendages called parapodia for locomotion. Nereis may have two types of setae that are present on the parapodia. The setae which provide support are acicular, and the setae that are visible on the exterior of the Polychaeta as bristles and are for crawling are locomotor chaetae.