Ecology Final Review

The science of ecology is best defined as the study of

• the classification of plants and animals

• the interaction of living organisms and their environment

• weather and its effects on food production in the ocean

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Abiotic factors that affect the growth of grass in a lawn include

• earthworms and nutrients

• moisture and minerals

• fertilizers and decomposers

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Which plant species represent pioneer organisms?

• grass

• shrub

• hardwood forest

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If the ecosystem is not altered, which stage would be the most stable?

• shrub

• pine forest

• hardwood forest

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In which biome would you expect to find these species?

• temperate deciduous forest

• tiaga

• rainforest

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The graph below shows the changes in the size of a fish population over time. The dashed line on the graph represents.

• life span of the species

• level at which extinction is reached

• carrying capacity of the environment

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Cutting down a rain forest and planting agricultural crops, such as coffee plants, would most likely result in

• a decrease in biodiversity

• an increase in the amount of energy recycled

• a decrease in erosion

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Animals that feed exclusively on herbivores are known as

• primary consumers

• carnivores

• producers

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For a producer to maintain itself, which factor must be present in its environment?

• herbivores

• sunlight

• parasites

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Imported animal species often disrupt an ecosystem because in their new environment they will most likely

• eliminate the genetic variation of the autotrophs

• increase the number of mutations in the herbivores

• have no natural enemies

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