Chapter 25:
What is an Animal?
1.
Which of the organisms in Figure 25-3 has bilateral symmetry but no endoskeleton?
a.
C
b.
B
c.
D
d.
A
Hint
2.
In Figure 25-2, where is the gastrula?
a.
C
b.
B
c.
D
d.
A
Hint
3.
Which of the organisms in Figure 25-3 is asymmetrical?
a.
D
b.
A
c.
C
d.
B
Hint
4.
In Figure 25-2, where is the endoderm?
a.
C
b.
D
c.
A
d.
B
Hint
5.
In Figure 25-2, where is the ectoderm?
a.
B
b.
D
c.
C
d.
A
Hint
6.
In Figure 25-2, if part A develops into a mouth, this organism will be a _____.
a.
autosome
b.
autotroph
c.
protosome
d.
deuterosome
Hint
7.
Which of the organisms in Figure 25-3 has the most complex systems developed from coelom?
a.
B
b.
D
c.
A
d.
C
Hint
8.
Which of these animals has bilateral symmetry?
a.
jellyfish
b.
sponge
c.
flatworm
d.
hydra
Hint
9.
Which of the organisms in Figure 25-3 probably has the most muscular control?
a.
B
b.
D
c.
A
d.
C
Hint
10.
In Figure 25-2, where is the mesoderm?
a.
B
b.
C
c.
A
d.
D
Hint
