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Biology · ANIMAL KINGDOM

हिन्दी

Aquatic annelids like Nereis possess lateral appendages which help in swimming. What are these appendages called, and what locomotion mechanism is used by terrestrial annelids?

  1. Comb plates; ciliary beating
  2. Tentacles; muscular pumping of pharynx
  3. Choanocytes; flagellar water movement
  4. Parapodia; contraction of longitudinal and circular body wall muscles

Correct answer · Option 4

Parapodia; contraction of longitudinal and circular body wall muscles

Explanation

Nereis possesses lateral appendages called parapodia for swimming. Annelids possess longitudinal and circular muscles in the body wall which aid in contraction and locomotion.

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