chapter 20 Quiz 2

The following is a food web found in grassland.

The fourth trophic level is the highest trophic level in this food web.

• True

• False

The following is a food web found in grassland.

S is a heterotroph.

• True

• False

The following is a food web found in grassland.

U is both a primary consumer and a secondary consumer.

• True

• False

The following is a food web found in grassland.

Decomposers are not shown in this food web.

• True

• False

The following is a food web found in grassland.

If the energy input for each food chain is the same, the transfer of energy between P and Q is higher than P and T.

• True

• False

The following is a food web found in grassland.

The biomass of P is higher than S.

• True

• False

The diagram shows some processes in the carbon cycle.

Identify processes I.

• photosynthesis

• respiration

• decomposition

The diagram shows some processes in the carbon cycle.

Identify processes II.

• photosynthesis

• respiration

• decomposition

The diagram shows some processes in the carbon cycle.

In which process do decomposers play an important role?

• I

• II

• III

• IV

The diagram shows some processes in the carbon cycle.

Explain how human activities affect process IV.

• Burning of fossil fuels by humans releases carbon dioxide into the atmosphere.

• Burning of fossil fuels by humans absorbs carbon dioxide from the atmosphere.