Free Printable Bioenergetics Review

1.

Organisms that depend on other organisms for food

a)

Autotroph

b)

Heterotroph

c)

Herbivore

d)

Decomposer

2.

Organisms that break down the material of dead organisms

a)

Decomposer

b)

Autotroph

c)

Heterotroph

d)

Herbivore

3.

Organisms that produce food for itself

a)

Heterotroph

b)

Autotroph

c)

Decomposer

d)

Consumer

4.

Organisms that only eat plants

a)

Herbivore

b)

Carnivore

c)

Omnivore

d)

Pescatarian

5.

Organisms that only eat animals

a)

Herbivore

b)

Carnivore

c)

Omnivore

d)

Pescatarian

6.

The diagram here is called a trophic pyramid. It shows trophic levels of a grassland habitat. The size of each trophic level represents biomass, with producers representing the largest amount of biomass. Which of the following best explains the unique shape of the trophic pyramid?

a)

a. The higher levels of the pyramid are smaller due to human interference with those organisms.

b)

b. Decomposers work more rapidly breaking down animal tissue than plant tissue.

c)

c. The organisms on the lower level of the pyramid tend to be smaller in size.

d)

d. The higher levels of the pyramid are smaller due to the inefficiency of energy transfer.

7.

1. Which of the following statements is true?

a)

a. Heterotrophs produce their own food.

b)

b. Autotrophs take in nutrients from outside themselves.

c)

c. Consumers are heterotrophs.

d)

d. Consumers are autotrophs.

8.

1. As energy is transferred between trophic levels, only a small fraction of the available energy is transferred. How can this observation be explained, taking into account the law of conservation of energy?

a)

a. Organic systems do not demonstrate the conservation of energy.

b)

b. Organisms, even after death, continue to store energy in organic molecules.

c)

c. Since biomass increases at higher levels, the concentration of energy is the same.

d)

d. The unused energy is lost as heat through metabolic processes.

9.

1. An ecosystem has an ecological efficiency of 10 percent. If the producer level contains 10,000 kilocalories of energy, how much energy does the tertiary consumer level contain?

a)

a. 1 kcal

b)

b. 10 kcal

c)

c. 100 kcal

d)

d. 1000 kcal

10.

1. Beginning at the lowest trophic level, arrange the following food chain found on the Serengeti Plain of Africa in the correct sequence.

a)

a. Shrubs–gazelles–cheetahs–decomposers

b)

b. Shrubs–decomposers–gazelles–cheetahs

c)

c. Shrubs–decomposers–cheetahs–gazelles

d)

d. Gazelles–decomposers–cheetahs–shrubs

11.

1. What is lost to the environment at each of the trophic levels (indicated with X)?

a)

a. Nutrients

b)

b. Living space

c)

c. Sunlight

d)

d. Heat

12.

1. What is the order of trophic levels on an ecological pyramid?

a)

a. Primary consumer -> secondary consumer -> producers

b)

b. Producers -> primary consumers -> secondary consumers

c)

c. Secondary consumers -> primary consumers -> producers

13.

1. Use the food chain to answer the question. In which part of the food chain is the greatest amount of energy transferred?

a)

a. From the grass to the insect

b)

b. From the insect to the frog

c)

c. From the frog to the owl

d)

d. From the owl to the hawk

14.

1. What is similar between autotrophs and heterotrophs

a)

a. Both need to obtain energy

b)

b. Both eat other organisms to gain energy

c)

c. Both use the same method of absorbing water

d)

d. Both make their own energy from photosynthesis

15.

1. The diagram shows the relative amount of energy stored at each level of an ecosystem. What percentage of energy created by producers is used by third-level consumers?

a)

a. 0.1%

b)

b. 9 %

c)

c. 10 %

d)

d. 90 %

Bioenergetics Review

Total questions: 15

Worksheet time: 9mins

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