Chapter 13 Practice Test - biorules.org

Test # ____ Ver. A

Chapter 13 Practice Test

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1. A group of organisms of the same species that 7. Which process is part of the hydrologic cycle?
live in the same area is called a(n) a. nitrification
a. community. b. evaporation
b. population. c. decomposition
c. biome. d. ammonification
d. ecosystem.
8. Which of the following provide most of the
2. Herbivores are which of the following? energy in ecosystems?
a. producers a. keystone species
b. secondary consumers b. carnivores
c. primary consumers c. generalists
d. decomposers d. producers

3. Which phrase best describes biodiversity? 9. Almost all autotrophs get their energy from
a. the number of individuals in an ecosystem a. sunlight.
b. the amount of biomass in an ecosystem b. hydrothermal pools.
c. the amount of available energy in an c. decaying matter.
ecosystem d. producers.
d. the number of species in an ecosystem
10. An organism that has an unusually large effect
4. Which organisms help convert gaseous on an ecosystem is called a(n)
nitrogen into ammonia in the nitrogen cycle? a. keystone species.
a. bacteria b. omnivore.
b. trees c. biotic factor.
c. squirrels d. heterotroph.
d. grasses
11. A major regional or global community of
5. Organisms that feed on dead or decaying organisms is called
matter are called a. an ecosystem.
a. herbivores. b. a biome.
b. carnivores. c. a species.
c. omnivores. d. a population.
d. detritivores.
12. A group of gray wolves living in Minnesota is
6. What do all the biotic and abiotic factors in a an example of
given area make up? a. a community.
a. a habitat b. a population.
b. a community c. a biome.
c. an ecosystem d. an ecosystem.
d. a population

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Page 2 of 5 Ver. A

13. Which of the following can be both primary and 18. If a keystone species is removed from an
secondary consumers? ecosystem,
a. herbivores a. abiotic and biotic factors can be affected.
b. carnivores b. only biotic factors can be affected.
c. omnivores c. only abiotic factors can be affected.
d. detritivores d. neither abiotic nor biotic factors can be
affected.
14. Bacteria are important in the nitrogen cycle
because they 19. Which of the following descriptions about the
a. help convert nitrogen into a form that organization of an ecosystem is correct?
organisms can use. a. Communities make up species, which
b. respire, returning carbon dioxide into the make up populations.
atmosphere. b. Populations make up species, which make
c. decay and eventually form fossil fuels. up communities.
d. produce sugars that plants can use. c. Species make up communities, which
make up populations.
15. A pyramid of numbers is used to show d. Species make up populations, which make
a. the distribution of biomass in an up communities.
ecosystem.
b. a network of feeding relationships. 20. The lowest level of environmental complexity
c. the distribution of organisms in an that includes living and nonliving factors is the
ecosystem. a. biome.
d. a chain of feeding relationships. b. community.
c. ecosystem.
16. All of the biotic & abiotic factors that inhabit the d. biosphere.
savannas around the world make up a(n)
a. ecosystem. 21. A mathematical formula designed to predict
b. biome. population fluctuations in a community could
c. species. be called a(an)
d. population. a. biological experiment.
b. biological system.
17. What are two processes by which autotrophs c. ecological model.
make food? d. ecological observation.
a. chemosynthesis and photosynthesis
b. photosynthesis and respiration 22. What is the original source of almost all the
c. chemosynthesis and decomposition energy in most ecosystems?
d. decomposition and combustion a. carbohydrates
b. sunlight
c. water
d. carbon

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Figure 3-1

23. The algae at the beginning of the food chain in 27. The total amount of tissue of all the organisms
Figure 3-1 are in a food chain is called the
a. consumers. a. organic mass.
b. decomposers. b. trophic mass.
c. producers. c. energy mass.
d. heterotrophs. d. biomass.

24. An organism that produces its own food supply 28. What is the term for each step in the transfer of
from inorganic compounds is called a(an) energy and matter within a biological
a. heterotroph. community?
b. consumer. a. energy path
c. detritivore. b. food web
d. autotroph. c. trophic level
d. food pyramid
25. An organism that cannot make its own food is
called a(an) 29. A bird stalks, kills, and then eats an insect.
a. heterotroph. Based on its behavior, which ecological terms
b. chemotroph. describe the bird?
c. autotroph. a. herbivore, decomposer
d. producer. b. producer, heterotroph
c. carnivore, consumer
26. All the interconnected feeding relationships in d. autotroph, herbivore
an ecosystem make up a food
a. interaction.
b. chain.
c. network.
d. web.

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30. Figure 3-2 illustrates a(an) Figure 3-2
a. biomass pyramid.
b. food pyramid. 32. Only 10 percent of the energy stored in an
c. numbers pyramid. organism can be passed on to the next trophic
d. energy pyramid. level. Of the remaining energy, some is used
for the organism’s life processes, and the rest
31. In which way does Figure 3-2 differ from a is
typical model of trophic levels? a. used in reproduction.
a. Second-level consumers outnumber b. stored as body tissue.
first-level consumers. c. stored as fat.
b. Third-level consumers outnumber d. eliminated as heat.
second-level consumers.
c. First-level consumers outnumber 33. Which type of pyramid shows the amount of
producers. living tissue at each trophic level in an
d. First-level consumers outnumber ecosystem?
second-level consumers. a. a numbers pyramid
b. an energy pyramid
c. a biomass pyramid
d. a food pyramid

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Page 5 of 5 Ver. A

34. Which of the following is NOT recycled in the
biosphere?
a. water
b. nitrogen
c. carbon
d. energy

35. How is carbon stored in the biosphere?
a. in the atmosphere as carbon dioxide
b. underground as fossil fuels and calcium
carbonate rock
c. in the oceans as dissolved carbon dioxide
d. all of the above

36. Nitrogen fixation is carried out primarily by
a. humans.
b. plants.
c. bacteria.
d. ammonia.

37. Which of the following has a direct role in the
nitrogen cycle?
a. bacteria
b. legumes
c. decomposers
d. all of the above

38. The movements of energy and nutrients
through living systems are different because
a. energy flows in one direction and nutrients
recycle.
b. energy is limited in the biosphere and
nutrients are always available.
c. nutrients flow in one direction and energy
recycles.
d. energy forms chemical compounds and
nutrients are lost as heat.

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ID: A

Chapter 13 Practice Test
Answer Section

MULTIPLE CHOICE

1. B
2. C
3. D
4. A
5. D
6. C
7. B
8. D
9. A
10. A
11. B
12. B
13. C
14. A
15. C
16. B
17. A
18. A
19. D
20. C
21. C
22. B
23. C
24. D
25. A
26. D
27. D
28. C
29. C
30. C
31. C
32. D
33. C
34. D
35. D
36. C
37. D
38. A

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