Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Sea
stars are fierce competitors of marine organisms such as clams and mussels. An ecologist studying an
ocean ecosystem performed an experiment in which the sea stars were removed from the ecosystem. After
the removal of the sea stars, a. | the ecosystem became more diverse. | b. | the size of the
ecosystem was reduced. | c. | food webs in the ecosystem became more
complex. | d. | the number of species in the ecosystem was
reduced. | | |
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2.
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Major
ecosystems that occur over wide areas of land are called a. | communities. | c. | biomes. | b. | habitats. | d. | food chains. | | | | |
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3.
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Generally, the closer an ecosystem is to the equator, a. | the longer its
growing season. | c. | the warmer its
temperature. | b. | the greater its diversity. | d. | All of the above | | | | |
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4.
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Generally, the closer an area is to the equator, the greater the diversity in species.
Following are the latitudes of four cities. Which city would you predict to have the greatest
diversity of species? a. | Berlin, Germany (latitude: about 52°
N) | b. | Montreal, Canada
(latitude: 45° N) | c. | Denver, Colorado (latitude: about 40°
N) | d. | Brisbane,
Australia (latitude: about 28° N) | | |
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5.
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Almost all of the Earth’s surface water is contained in a. | ocean
ecosystems. | c. | tropical rain
forests. | b. | freshwater biomes. | d. | ponds and lakes. | | | | |
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