Which of the following is true of annelids? a) They have a gastrovascular cavity. b) They have an open circulatory system. c) They have a nerve net. d) They have pseudocoeloms. e) They perform gas exchange across their skin.

e) They perform gas exchange across their skin.

Explanation:

Annelids are organisms which are invertebrates and are worms. Examples

Include earthworm, rag worm and leeches.

They don't have a gastrovascular cavity. They don't have an open circulatory system, instead it operates on a closed circulatory system. They lack pseudocoeloms which is the space between the endoderm and mesoderm. They however exchange gases through their moist skin.