Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Members of this phylum have a brain with a ventral nerve cord,a complete gut,and a circulatory system that is usually closed.

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Quizplus · Accepted Answer

Annelida is the best choice as it is the only phylum listed that has all three characteristics mentioned - a brain with ventral nerve cord, a complete gut, and a circulatory system that is usually closed. Porifera does not have a true nervous system, while Cnidaria, Platyhelminthes, and Nematoda do not have a complete circulatory system.