Food Webs and Chains

The picture shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?

• The foxes will eat more wolves

• The foxes will eat fewer wolves

• There will be more foxes and wolves

• There will be fewer foxes and wolves

The picture shows an ocean bay food chain. Sea otters move into the ocean bay. They eat all the sea urchins. This change will cause the

• kelp to have less food

• crabs to have more food

• sea ducks to have less food

• arctic foxes to have more food

Which model correctly shows energy flow in a food chain?

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A marine food web is shown. Which organism below belongs in level 3 of this marine food web?

• salmon

• zooplankton

• sea algae

• polar bear

A marine food web is shown. Which chart correctly shows three of the organisms according to their roles in cycling matter in the marine food web?

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This picture shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wildfire burns the environment?

• Hawks would increase and foxes would increase.

• Hawks would decrease and foxes would increase.

• Meadow plants would increase and rabbits would decrease.

• Meadow plants would decrease and rabbits would decrease.

Which statement best describes what will happen if the population of herbivores in the community decreases?

• The population of foxes will increase.

• The population of hawks will increase.

• The population of rabbits will increase.

• The population of meadow plants will increase.

Which statement best describes the flow of energy as it passes through the organisms in the pyramid?

• Energy flows through the organisms from bottom to top and increases at each level.

• Energy flows through the organisms from bottom to top and decreases at each level.

• Energy flows through the organisms from top to bottom and increases at each level.

• Energy flows through the organisms from top to bottom and decreases at each level.

The diagram shows a simple food web. Which animal is classified as an omnivore?

• red fox

• deer

• black bear

• rabbit

The diagram shows a simple food web. Which of the following animals might compete with the coyote in this food chain?

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