ZoologyWhich of the following features are common for Nereis and Hirudinaria?

Which of the following features are common for Nereis and Hirudinaria?

  1. A

    Metamerism and nephridia

  2. B

    Parapodia and closed circulatory system

  3. C

    Dioecious condition and indirect development

  4. D

    Triploblastic condition and radial symmetry

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    Solution:

    All annelids are metamerically segmented and have nephridia for excretion. 

    Parapodia are absent in Hirudinaria

    Nereis is dioecious while Hirudinaria is monoecious. 

    Development is indirect in Nereis while it is direct in Hirudinaria

    Both are triploblastic and bilaterally symmetrical.

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