Glencoe Biology

Chapter 24: Introduction to Animals

Chapter Test Practice-English

1
Animals that feed on other organsims for nutrients are described as ____.
A)unicellular
B)heterotrophic
C)segmented
D)invertebrate
2
How do cnidarians exhibit mutualism?
A)by eating crabs
B)by getting food from crabs while protecting them
C)by getting food from crabs without affecting them
D)by competing with crabs for food
3
How do scientists mark the branching points of animal evolution?
A)habitat changes
B)anatomical features
C)population growth
D)eating habits
4
In protostomes, the ____ develops from the opening in the gastrula.
A)nervous system
B)anus
C)mouth
D)tail
5
The ____ is the outer layer of cells in the gastrula.
A)coelom
B)endoderm
C)ectoderm
D)protostome
6
The similarity or balance among body structures is called ____.
A)symmetry
B)cephalization
C)the evolutionary tree
D)ectoderm
7
This hummingbird has what kind of body design?

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A)mesodermic symmetry
B)asymmetry
C)radial symmetry
D)bilateral symmetry
8
What do these two evolutionary pictures indicate?

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A)two different theories of cnidarian ancestry
B)polyps and medusae merged into one structure
C)two different species of cnidarians
D)a single evolutionary theory
9
What does this picture show?

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A)reproductive structure in sponges
B)reproductive structure in cnidarians
C)feeding structure in sponges
D)feeding structure in cnidarians
10
Which of the following does not describe a sponge's respone to stimuli?
A)detection of chemical signals
B)reaction of epithelial-like cells
C)closure of pores
D)impulse of a nerve fiber
11
Which of the following is not a means of asexual reproduction?
A)cephalization
B)budding
C)regeneration
D)fragmentation
12
Which of these is the correct sequence in cnidarian reproduction?
A)release of sperm, growth of larvae, new medusae
B)growth of larvae, formation of eggs and sperm
C)growth of polyps, release of sperm, growth of larvae
D)formation of medusae, growth of larvae and polyps
13
Which of these occurs during early embryo development?
A)cell number decreases; amount of cytoplasm increases
B)cell number increases; amount of cytoplasm remains
C)cell number remains the same
D)cytoplasm disappears
14
Which structure results from the inward movement of cells in the blastula?

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A)2-cell stage
B)16-cell stage
C)gastrula
D)sperm cell
15
Why is the flatworm considered an acoelomate?
A)has no endoderm
B)has multiple body cavities
C)has no ectoderm
D)lacks a body cavity
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