Name______________________________
Class __________________
Date ______________
Chapter 18 Classification
Chapter Test B
Multiple Choice
Write the letter that best answers the question or completes the statement on
the line provided.
____ 1. Biologists use a classification system to group organisms in
part because organisms
a. are going extinct.
b. are very numerous and diverse.
c. are too much alike.
d. share too many derived characters.
____ 2. The study of organisms requires the use of
a. only large, general categories of organisms.
b. only small, specific categories of organisms.
c. both large and small categories of organisms.
d. no categories of organisms.
____ 3. In binomial nomenclature, which of the two terms is
capitalized?
a. the first term only
c. both the first and second terms
b. the second term only d. neither the first nor the second term
____ 4. In Linnaeus’s system of classification, how many taxonomic
categories were there?
a. one
c. five
b. three
d. seven
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____ 5. A genus is composed of a number of related
a. kingdoms.
c. orders.
b. phyla.
d. species.
____ 6. Animals that are warm blooded, have body hair, and produce
milk for their young are grouped in the class
a. Amphibia.
c. Aves.
b. Mammalia.
d. Reptilia.
____ 7. The procedure of grouping organisms based on their
evolutionary history is called
a. traditional classification.
b. binomial nomenclature.
c. derived characters.
d. evolutionary classification.
____ 8. What do scientists consider when they perform cladistic
analysis?
a. only the DNA of organisms
b. all traits of organisms
c. derived characters
d. only physical similarities
Chapter 18 Test B 223
Name______________________________
Class __________________
Date ______________
____ 9. Similar genes are evidence of
a. binomial nomenclature.
b. mutations.
c. common ancestry.
d. different anatomy.
____10. What do all organisms have in common?
a. They use DNA and RNA to pass on information.
b. They are all prokaryotes.
c. They are all eukaryotes.
d. They are genetically identical.
____11. All organisms in the kingdoms Protista, Plantae, Fungi, and
Animalia are
a. multicellular organisms.
b. photosynthetic organisms.
c. eukaryotes.
d. prokaryotes.
____12. Which kingdom contains heterotrophs with cell walls of
chitin?
a. Protista
c. Plantae
b. Fungi
d. Animalia
____13. The domain that includes the kingdom Eubacteria is
a. Archaea.
c. Eukarya.
b. Bacteria.
d. Fungi.
____14. The domain that contains unicellular organisms that live in
extreme environments is
a. Eubacteria.
c. Archaea.
b. Eukarya.
d. Bacteria.
Completion
Complete each statement on the line provided.
16. When scientists use a(an) ___________________ for an organism, they can be certain
they are all discussing the same organism.
17. The use of a two-part scientific name for organisms is called ___________________
nomenclature.
18. In Linnaeus’s system of classification, the two smallest categories are genus and
___________________ .
224
Chapter 18 Test B
© Pearson Education, Inc. All rights reserved.
____15. The three-domain system arose when scientists grouped
organisms according to how long they have been
a. alive in their present forms.
b. going extinct.
c. evolving independently.
d. using DNA to store information.
Name______________________________
Class __________________
Date ______________
19. The six kingdoms of life include eubacteria, archaeabacteria, protists, fungi, animals,
and ___________________ .
20. The domain ___________________ contains plants, fungi, protists, and animals—which
are all eukaryotes.
Short Answer
In complete sentences, write the answers to the questions on the lines provided.
21. What is evolutionary classification? How does it differ from
traditional classification?
_________________________________________________________________________________
_________________________________________________________________________________
Appendages
Crab
Conical shells
Barnacle
Limpet
Crustaceans
Crab
Barnacle
Mollusk
Limpet
Molted
exoskeleton
Segmentation
Tiny free-swimming
larva
A
B
Figure 18-1
22. Which grouping in Figure 18-1, A or B, shows the older, traditional
method of classifying the three animals shown? What kind of
evidence was used to carry out that classification?
_________________________________________________________________________________
© Pearson Education, Inc. All rights reserved.
_________________________________________________________________________________
23. Which system of grouping in Figure 18-1, A or B, provides
information about the evolution of the three animals? What is the
name of the diagram used to show that information?
_________________________________________________________________________________
_________________________________________________________________________________
24. What characteristic did biologists use to reclassify some organisms
from the plant or animal kingdom to the kingdom Protista?
_________________________________________________________________________________
_________________________________________________________________________________
25. What characteristic is used to place an organism in the domain
Eukarya?
_________________________________________________________________________________
_________________________________________________________________________________
Chapter 18 Test B 225
Name______________________________
Class __________________
Date ______________
Using Science Skills
Use the diagram below to answer the following questions on the lines
provided.
Grizzly
bear
Black
bear
Giant
panda
Red
fox
Abert
squirrel
Coral
snake
Sea
star
KINGDOM Animalia
PHYLUM Chordata
CLASS Mammalia
ORDER Carnivora
FAMILY Ursidae
GENUS Ursus
SPECIES Ursus arctos
Figure 18-2
26. Interpreting Graphs Which taxonomic category shown in Figure
18-2 contains the greatest number of different organisms?
_________________________________________________________________________________
_________________________________________________________________________________
28. Classifying Do all organisms shown in Figure 18-2 that belong to
the class Mammalia also belong to the genus Ursus? Explain.
_________________________________________________________________________________
29. Observing Based on the information in Figure 18-2, describe how
the diversity at each level changes from species to kingdom.
_________________________________________________________________________________
30. Inferring Considering the information in Figure 18-2, if you were
given a species name and no other information about an
unfamiliar organism, what is the largest taxonomic category that
you could assign it to?
_________________________________________________________________________________
226
Chapter 18 Test B
© Pearson Education, Inc. All rights reserved.
27. Classifying Do all organisms shown in Figure 18-2 that belong to
the order Carnivora also belong to the phylum Chordata? Explain.