CPS 3 Final review

The diagram shows a(n)

• population

• community

• energy pyramid

• food web

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High biodiversity often helps make an ecosystem more

• resilient

• competitive

• susceptible to disease

• challenging to survival

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Until the United States restricted DDT use in 1972,

• crop failures occurred all over the U.S.

• bald eagle population in the U.S. were in danger of extinction.

• algal blooms were uncommon.

• pollution of groundwater was not a problem.

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Which is a biotic factor that affects population size?

• available sunlight

• food

• temperature

• precipitation

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Crop rotation helps to conserve fertile soil by

• slowing down the depletion of nutrients in the soil.

• loosening the topsoil so that plant roots can penetrate the ground.

• creating dams that prevent erosion.

• creating a series of flat steps that prevents erosion.

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The geological time scale is based on the

• principle of index fossils.

• fossil record.

• law of superposition.

• theory of endosymbiosis.

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Solar energy can be trapped in the atmosphere by

• ozone.

• radiation.

• carbon dioxide.

• sunlight.

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Precipitation and evaporation are important components of the

• water cycle.

• oxygen cycle.

• carbon cycle.

• nitrogen cycle.

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Directional selection tends to eliminate

• newly formed phenotypes.

• one extreme in a range of phenotypes.

• both extremes in a range of phenotypes.

• intermediate phenotypes.

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A layer of ozone in the atmosphere was critical to the formation of life on land because

• there is a high concentration of ozone in the oceans.

• ozone is necessary in order to produce oxygen.

• land plants need ozone for photosynthesis.

• ozone blocks ultraviolet radiation.

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