Biology: The Dynamics of Life, California Edition

Chapter 25: What is an animal?

What is an animal?

1.
Which of these is a characteristic of segmented worms?
A)asymmetrical
B)complex internal organs
C)one-way digestive tract
D)has a backbone
2.
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What does this illustration represent?
A)cleavage
B)mitosis
C)photosynthesis
D)fertilization
3.
When an animal begins to develop, which step follows fertilization and comes before additional cell divisions?
A)formation of the mesoderm
B)formation of the blastula
C)gastrulation
D)first cell division
4.
Which of these is NOT a characteristic of all animals?
A)is a eukaryote
B)has cells with cell walls
C)is a heterotrope
D)has multiple cells
5.
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Look at this animal. Which body structure describes this animal?
A)radial symmetry
B)diagonal symmetry
C)bilateral symmetry
D)asymmetry
6.
The greatest diversity of species in the animal kingdom can be found among __________.
A)the coelomates
B)the pseudocoelomates
C)the protocoelomates
D)the acoelomates
7.
Which of these animals is an invertebrate?
A)grasshoppers
B)monkeys
C)snakes
D)seagulls
8.
Which of these describes an animal whose mouth develops from cells found on the gastrula?
A)a larva
B)an embryo
C)a blastula
D)a deuterosome
9.
Which of these characteristics does not correctly explain why elephants are classified as animals?
A)Elephants are sessile.
B)Elephants are eukaryotes.
C)Elephants are multicellular organisms.
D)Elephants depend on autotrophs for food.
10.
Corals are animals that move around their environment only during the early part of their lives, then they become __________.
A)sessile
B)vertebrates
C)bilaterally symmetric
D)autotrophs
11.
__________ is the layer of cells in a developing embryo between the ectoderm and the endoderm.
A)gastrula
B)zygote
C)mesoderm
D)cleavage
12.
Which of these is NOT a characteristic of vertebrates?
A)bilateral symmetry
B)backbone
C)exoskeleton
D)endoskeleton
13.
Which one of these animals is not classified in the same way as the other three?
A)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078665809/181857/ch25_0_b.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (4.0K)</a>
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C)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078665809/181857/ch25_0_d.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>
D)<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078665809/181857/ch25_0_e.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (5.0K)</a>
14.
Which of these statements is NOT true?
A)Insects go through a developmental phase that is an intermediate step between being an embryo and being an adult.
B)Growth and development of animals to reach the adult stage can take a few days or even years, depending on the species.
C)Juveniles are smaller versions of adult animals.
D)Animals that are sessile never swim freely during their lifetimes.
15.
Which of these terms describe the head end of a bilaterally symmetrical animal?
A)dorsal
B)ventral
C)anterior
D)posterior
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