Respond to statements 146150 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.
Question 2Matching. Choose the most appropriate answer for
each.
1. ___ millipede
2. ___ annelids
3. ___ arthropods
4. ___ placozoan
5. ___ cnidarians
6. ___ echinoderms
7. ___ flatworms
8. ___ rotifers
9. ___ mollusks
10. ___ roundworms
11. ___ sponges
A. two pairs of legs per segment
B. tiny, flattened, crawling forms
C. planarians, flukes, tapeworms
D. nematodes
E. snails, squids, clams
F. wheel animals
G. flagellated collar cells present
H. jellyfish and corals
I. crustaceans, ticks, and insects
J. polychaetes, earthworms, leeches
K. sea urchins, sea stars