Which of the following is true of annelids?
A. They have an open circulatory system
B. They have a nerve net
C. They perform gas exchange across their skin
D. They have pseudocoeloms
Answer:C
Which of the following is true of annelids?
A. They have an open circulatory system B. They have a nerve net C. They perform gas exchange across their skin D. They have pseudocoeloms