Chapter 27:
Mollusks and Segmented Worms
1.
According to Figure 27-5, which phylum evolved first?
a.
planaria
b.
bivalves
c.
nematodes
d.
annelids
Hint
2.
Which part of the squid shown in Figure 27-3 is analogous to a snail’s shell?
a.
D
b.
A
c.
B
d.
C
Hint
3.
Which shell shown in Figure 27-2 came from a stomach-footed mollusk?
a.
none of them
b.
C
c.
B
d.
A
Hint
4.
In the earthworm shown in Figure 27-4, what part is analagous to the central nervous system in humans?
a.
D
b.
B
c.
A
d.
C
Hint
5.
In the earthworm shown in Figure 27-4, what part is analagous to the throat in humans?
a.
A
b.
D
c.
B
d.
C
Hint
6.
In the earthworm shown in Figure 27-4, what part is analogous to the stomach in humans?
a.
C
b.
A
c.
D
d.
B
Hint
7.
Which shell shown in Figure 27-2 is from the most recently evolved organism?
a.
B
b.
none of them
c.
A
d.
C
Hint
8.
Which shell shown in Figure 27-2 came from a mollusk that uses jellyfish nematocysts for protection?
a.
none of them
b.
C
c.
B
d.
A
Hint
9.
Which part of the squid shown in Figure 27-3 is the foot?
a.
A
b.
D
c.
B
d.
C
Hint
10.
According to Figure 27-5, which phylum are annelids closest to on an evolutionary scale?
a.
bivalves
b.
gastropods
c.
nematodes
d.
cestodes
Hint
