Test # ____ Ver. A
Chapter 13 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A group...
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 live in the same area is called a(n) a. community. b. population. c. biome. d. ecosystem.
7. Which process is part of the hydrologic cycle? a. nitrification b. evaporation c. decomposition d. ammonification 8. Which of the following provide most of the energy in ecosystems? a. keystone species b. carnivores c. generalists d. producers
2. Herbivores are which of the following? a. producers b. secondary consumers c. primary consumers d. decomposers 3. Which phrase best describes biodiversity? a. the number of individuals in an ecosystem b. the amount of biomass in an ecosystem c. the amount of available energy in an ecosystem d. the number of species in an ecosystem
9. Almost all autotrophs get their energy from a. sunlight. b. hydrothermal pools. c. decaying matter. d. producers. 10. An organism that has an unusually large effect on an ecosystem is called a(n) a. keystone species. b. omnivore. c. biotic factor. d. heterotroph.
4. Which organisms help convert gaseous nitrogen into ammonia in the nitrogen cycle? a. bacteria b. trees c. squirrels d. grasses
11. A major regional or global community of organisms is called a. an ecosystem. b. a biome. c. a species. d. a population.
5. Organisms that feed on dead or decaying matter are called a. herbivores. b. carnivores. c. omnivores. d. detritivores.
12. A group of gray wolves living in Minnesota is an example of a. a community. b. a population. c. a biome. d. an ecosystem.
6. What do all the biotic and abiotic factors in a given area make up? a. a habitat b. a community c. an ecosystem d. a population
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Page 2 of 5 Ver. A 18. If a keystone species is removed from an ecosystem, a. abiotic and biotic factors can be affected. b. only biotic factors can be affected. c. only abiotic factors can be affected. d. neither abiotic nor biotic factors can be affected.
13. Which of the following can be both primary and secondary consumers? a. herbivores b. carnivores c. omnivores d. detritivores 14. Bacteria are important in the nitrogen cycle because they a. help convert nitrogen into a form that organisms can use. b. respire, returning carbon dioxide into the atmosphere. c. decay and eventually form fossil fuels. d. produce sugars that plants can use.
19. Which of the following descriptions about the organization of an ecosystem is correct? a. Communities make up species, which make up populations. b. Populations make up species, which make up communities. c. Species make up communities, which make up populations. d. Species make up populations, which make up communities.
15. A pyramid of numbers is used to show a. the distribution of biomass in an ecosystem. b. a network of feeding relationships. c. the distribution of organisms in an ecosystem. d. a chain of feeding relationships.
20. The lowest level of environmental complexity that includes living and nonliving factors is the a. biome. b. community. c. ecosystem. d. biosphere.
16. All of the biotic & abiotic factors that inhabit the savannas around the world make up a(n) a. ecosystem. b. biome. c. species. d. population.
21. A mathematical formula designed to predict population fluctuations in a community could be called a(an) a. biological experiment. b. biological system. c. ecological model. d. ecological observation.
17. What are two processes by which autotrophs make food? a. chemosynthesis and photosynthesis b. photosynthesis and respiration c. chemosynthesis and decomposition d. decomposition and combustion
22. What is the original source of almost all the energy in most ecosystems? a. carbohydrates b. sunlight c. water d. carbon
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Page 3 of 5 Ver. A
Figure 3-1 23. The algae at the beginning of the food chain in Figure 3-1 are a. consumers. b. decomposers. c. producers. d. heterotrophs.
27. The total amount of tissue of all the organisms in a food chain is called the a. organic mass. b. trophic mass. c. energy mass. d. biomass.
24. An organism that produces its own food supply from inorganic compounds is called a(an) a. heterotroph. b. consumer. c. detritivore. d. autotroph.
28. What is the term for each step in the transfer of energy and matter within a biological community? a. energy path b. food web c. trophic level d. food pyramid
25. An organism that cannot make its own food is called a(an) a. heterotroph. b. chemotroph. c. autotroph. d. producer.
29. A bird stalks, kills, and then eats an insect. Based on its behavior, which ecological terms describe the bird? a. herbivore, decomposer b. producer, heterotroph c. carnivore, consumer d. autotroph, herbivore
26. All the interconnected feeding relationships in an ecosystem make up a food a. interaction. b. chain. c. network. d. web.
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Page 4 of 5 Ver. A
Figure 3-2 32. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is a. used in reproduction. b. stored as body tissue. c. stored as fat. d. eliminated as heat.
30. Figure 3-2 illustrates a(an) a. biomass pyramid. b. food pyramid. c. numbers pyramid. d. energy pyramid. 31. In which way does Figure 3-2 differ from a typical model of trophic levels? a. Second-level consumers outnumber first-level consumers. b. Third-level consumers outnumber second-level consumers. c. First-level consumers outnumber producers. d. First-level consumers outnumber second-level consumers.
33. Which type of pyramid shows the amount of living tissue at each trophic level in an ecosystem? 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.
