A student is revising Animal Diversity-I: nereis swims and crawls with paired fleshy lateral extensions bearing many bristles. What should the student write in the answer sheet?

Parapodia are paired lateral appendages of many polychaetes. They assist in locomotion and can also increase surface area for gas exchange. This MCQ belongs to the Polychaeta topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.