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

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Metamerism and nephridia

Parapodia and closed circulatory system

Dioecious condition and indirect development

Triploblastic condition and radial symmetry

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Detailed 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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