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Which one of the following is NOT a characteristic of phylum Annelida?

1. Closed circulatory system
2. Segmentation
3. Pseudocoelom
4. Ventral nerve cord

Correct answer: Pseudocoelom

Solution

Annelids are segmented worms with a closed circulatory system and a ventral nerve cord. They have a true coelom, so a pseudocoelom is not a characteristic of this phylum.

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