Respond to statements 146–150 in reference to the five animal
phyla listed below.
a. Porifera
b. Cnidaria
c. Platyhelminthes
d. Nematoda
e. Annelida
D 146. Members of this phylum have a pseudocoelomic
cavity.
D 147. Members of this group have a brain with nerve cords,
have a saclike or branched gut, and lack a circulatory
system.
M 148. Members of this phylum have a brain with a ventral
nerve cord, a complete gut, and a circulatory system
that is usually closed.
E 149. This phylum contains the most primitive species of
the animal kingdom in the list.
M 150. Tapeworms are members of this phylum.
Answers: 146. d, 147. c, 148. e, 149. a, 150. c
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