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Life on Earth is dependent on a continued input of energy from the sun.

A) True
B) False

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The richest marine ecosystems are those in the open water where large fish abound.

A) True
B) False

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What do autotrophs require in order to produce food for themselves and all the heterotrophs?


A) sunlight, inorganic nutrients
B) sunlight, organic nutrients
C) an energy source, water
D) an energy source, inorganic nutrients
E) heat, water

F) None of the above
G) B) and C)

Correct Answer

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Which term is analogous to the word "niche"?


A) address
B) job description
C) properties
D) needs
E) desires

F) A) and B)
G) A) and C)

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Which of the following is not a greenhouse gas?


A) oxygen
B) carbon dioxide
C) methane
D) nitrous oxide
E) hydrofluorocarbons

F) A) and E)
G) D) and E)

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Organisms that live in an aquatic environment get their carbon from calcium carbonate shells on the bottom, instead of from carbon dioxide in the environment.

A) True
B) False

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Which of the following is a legume involved in housing nitrogen-fixing bacteria?


A) ferns
B) oak trees
C) grass
D) beans
E) roses

F) B) and D)
G) A) and E)

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Almost 100% of the energy taken in by plants from the sun is available to an ecosystem.

A) True
B) False

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Both energy and chemicals cycle through an ecosystem.

A) True
B) False

Correct Answer

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Which of the following defines an ecosystem?


A) a group of organisms of the same species interacting together
B) all of the living organisms in an area interacting together
C) all living organisms and the nonliving environment interacting together
D) aspects of the nonliving environment interacting together
E) all the places on Earth where living organisms can be found

F) A) and D)
G) A) and E)

Correct Answer

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What is the name of the frigid ecosystem bordering the North Pole?


A) coniferous forests
B) prairies
C) temperate forests
D) taiga
E) tundra

F) A) and B)
G) A) and C)

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Do all ecological pyramids have a broad base with a smaller top?

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When water evaporates from the ocean, it leaves the salts behind.

A) True
B) False

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A detrital food web and a grazing food web are separate because each starts at a different level.

A) True
B) False

Correct Answer

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How does phosphate enter the soil?


A) conversion in the atmosphere due to lightning
B) precipitation from clouds
C) weathering of rocks
D) photosynthesis
E) cellular respiration

F) B) and C)
G) A) and B)

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What two characteristics define a biome?


A) temperature and the types of plants found there
B) amount of precipitation and the types of plants found there
C) temperature and rainfall
D) latitude and rainfall
E) altitude and temperature

F) All of the above
G) None of the above

Correct Answer

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Are humans capable of upsetting global biogeochemical cycles with their activities?

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The atmosphere would be considered what component of a chemical cycle?


A) reservoir
B) exchange pool
C) biotic community
D) source
E) none of these

F) All of the above
G) A) and D)

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What is the primary source of carbon for aquatic algae?


A) calcium carbonate
B) calcium chloride
C) bicarbonate
D) carbon dioxide
E) carbon monoxide

F) All of the above
G) D) and E)

Correct Answer

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Hail and snow are examples of


A) evaporation.
B) precipitation.
C) runoff.
D) transpiration.
E) aquifers.

F) D) and E)
G) B) and D)

Correct Answer

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