Pretest

Question 1

Which organisms obtain energy from dead or decaying matter? Choose two correct answers.

Revolt · Accepted Answer

D: earthworms; E: bacteria

Question 2

The size of a food chain can vary, but the number of levels that a food chain can reach is limited. Why does this limit exist?

Revolt · Accepted Answer

B: Energy is lost at each trophic level.

Question 3

In an ecosystem, a deer consumes grass. What percentage of energy will the deer acquire from the grass?

Revolt · Accepted Answer

D: 10 percent

Question 4

Question 4

Revolt · Accepted Answer

A: [Dropdown 1] 10

Question 5

Which of these is a heterotroph?

Revolt · Accepted Answer

A: plant; B: consumer

Question 6

Which of these is a producer?

Revolt · Accepted Answer

D: fern

Question 7

Which process is used by most producers to turn sunlight into food energy?

Revolt · Accepted Answer

A: photosynthesis

Question 8

Maggots get their energy by breaking down dead and decaying animals. What are maggots?

Revolt · Accepted Answer

C: decomposers

Question 9

Nida draws a diagram with insects, birds, and mice. She shows the mice eating grass; hawks, snakes, and toads eating the insects; and foxes, hawks, and snakes eating the birds and mice. The snakes are also eating the toads. Which best describes the diagram?

Revolt · Accepted Answer

B: food web

Question 10

In order to support all of the organisms in an ecosystem, which should have the greatest amount of biomass?

Revolt · Accepted Answer

A: producers

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