Section 1: Ecosystems: Everything Is Connected

Which of the following is an ecosystem?

• vacant lot

• oak forest

• coral reef

• all of the above

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The energy in most ecosystems comes from

• green plants.

• the sun.

• wind.

• the soil.

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The organisms most likely to belong to the same species are

• people at a football game.

• bacteria inside a person’s body.

• birds in a forest.

• organisms in a pond.

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Which of the following statements about an organism’s habitat is not true?

• a. Most organisms can survive if they are taken away from their habitat.

• b. An organism’s habitat is the place where it lives.

• c. A habitat has specific characteristics that an organism needs to live there.

• d. A habitat contains biotic and abiotic factors.

The community of a pond is made up of all the

• a. biotic and abiotic factors.

• b. resources organisms need.

• c. habitats in and around the water.

• d. populations of fish, insects, and other living organisms.

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Which of the following best describes a population in an ecosystem?

• c. Different species interacting in a habitat.

• b. All members of one species living in a specific area.

• d. The physical environment of an organism.

• a. All the living and nonliving things in an area.

What is the main role of producers in an ecosystem?

• d. To compete for resources with other species.

• c. To make their own food using sunlight.

• b. To consume other organisms for energy.

• a. To break down dead organisms.

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Which of the following is NOT a biotic factor in a forest ecosystem?

• b. Soil

• a. Trees

• d. Fungi

• c. Deer

A biologist is studying how a group of wolves hunts together in Yellowstone National Park. Which ecological level of organization is the focus of the study?

• Organism

• Population

• Community

• Ecosystem

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Scientists are measuring how rainfall and soil quality affect the survival of plants and animals in a Georgia pine forest. Which ecological level are they studying?

• Population

• Community

• Ecosystem

• Biosphere

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