Chapter 25:
What Is an Animal?
Practice Test
1.
The development of body cavities made it possible for animals to __________.
a.
get oxygen more effectively
b.
respond to stimuli
c.
grow larger and move more efficiently
d.
stay small
Hint
2.
The cell layer that forms during development and eventually becomes the skin and nervous tissues of the animal is the __________.
a.
ectoderm
b.
endoderm
c.
dermis
d.
mesoderm
Hint
3.
The evolution of the pseudocoelom made it possible for animals to __________.
a.
move more efficiently
b.
have space for complex internal organs
c.
become land animals
d.
become more adapted to their way of life
Hint
4.
A body cavity completely surrounded by mesoderm is called a __________.
a.
protosome
b.
blastula
c.
gastrula
d.
coelom
Hint
5.
The heart and blood vessels in a dog develop from the __________.
a.
mesoderm
b.
protostome
c.
endoderm
d.
ectoderm
Hint
6.
The cell layer that forms during development and eventually becomes the lining of the animal`s digestive tract is the __________.
a.
ectoderm
b.
mesoderm
c.
endoderm
d.
dermis
Hint
7.
A skeleton inside the body of an animal is called a(n) __________.
a.
endoskeleton
b.
mesoskeleton
c.
exoskeleton
d.
vertebrate
Hint
8.
The evolution of the coelom made it possible for animals to __________.
a.
become more adapted to their way of life
b.
become larger and thicker in body shape
c.
become land animals
d.
have space for complex internal organs
Hint
9.
The layer of cells on the outer surface of the gastrula is called the __________.
a.
dermis
b.
mesoderm
c.
endoderm
d.
ectoderm
Hint
10.
During development, the cells on the side of the blastula fold inward to produce a __________.
a.
mesoderm
b.
gastrula
c.
zygote
d.
fertilized egg
Hint
11.
A type of skeleton that can help to prevent water loss and provide protection is called a(n) ___________.
a.
endoskeleton
b.
vertebrate
c.
mesoskeleton
d.
exoskeleton
Hint
12.
An organism that can be divided vertically into similar right and left halves that form mirror images of one another is said to have __________.
a.
bilateral symmetry
b.
radial symmetry
c.
asymmetry
d.
total symmetry
Hint
13.
Animals such as earthworms digest food in a ________.
a.
digestive tract
b.
gizzard
c.
pseudocoelom
d.
gastrula
Hint
14.
Structures that act as a kind of watery skeleton against which muscles can work are called the _________.
a.
coelom and pseudocoelom
b.
acoelom and coelom
c.
coelom and mesoderm
d.
acoelom and pseudocoelom
Hint
15.
In acoelomate animals, such as flatworms, organs are located ________.
a.
in the fluid-filled body cavity lined with mesoderm
b.
in solid body tissues
c.
in the pseudocoelom
d.
in the coelom
Hint
