Chapter 33

Which phylum is characterized by animals that have a segmented body? (A) Cnidaria (C) Arthropoda (B) Platyhelminthes (D) Mollusca

The water vascular system of echinoderms (A) functions as a circulatory system that distributes nutrients to body cells. (B) functions in locomotion and feeding. (C) is bilateral in organization, even though the adult animal is not bilaterally symmetrical. (D) moves water through the animal's body during filter feeding.