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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Which of the following feature is common among Nereis, Pheretima and Hirudinaria?

Options

  1. AWell developed clitellum for cocoon formation
  2. BChitinous setae and parapodia for locomotion
  3. COpen circulatory system called haemocoel
  4. DCoelomate and metamerically segmented animals

Correct answer

D. Coelomate and metamerically segmented animals

Step-by-step solution

Nereis-Clitellum absent, setae and parapodia present and closed circulatory system. Pheretima-Clitellum well developed, only chitinous setae and closed circulatory system Hirudinaria-Temporary clitellum, setae and parapodia absent and open circulatory system. All the three are coelomates and are metamerically segmented animals.

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