Carbon Cycle Quiz

Which change would lead to higher carbon dioxide levels in the atmosphere?

• an increase in photosynthesis

• a decrease in animal respiration

• an increase in the burning of fossil fuels

• a decrease in the destruction of forests

Which action could lead to a reduction in atmospheric carbon?

• using coal to power a factory

• burning logs in a fireplace

• animals eating mushrooms in a field

• humans planting trees in a forest

Which two natural events would lead to this type of ecological succession?

• Clear-cutting of a forest

• Wind damage from a tornado

• Lava flow from a volcano

• Flooding with soil erosion

• Retreat of a glacier

What did researchers determine about the wing phenotypes of crickets from Kauai and Oahu?

• They are identical.

• They are different.

• They are similar.

• They are not observable.

Which graph best illustrates the fly and cricket population changes that occurred in the years immediately following the introduction of the flies?

• Graph A

• Graph B

• Graph C

• Graph D

Which graph best represents the scenario where the introduction of flies leads to a decrease in the cricket population over time?

• Graph A

• Graph B

• Graph C

• Graph D

In which graph do the cricket and fly populations both increase after the introduction of flies?

• Graph A

• Graph B

• Graph C

• Graph D

Which graph shows the cricket population remaining constant after the introduction of flies?

• Graph A

• Graph B

• Graph C

• Graph D

Which graph indicates that the introduction of flies has no effect on the cricket population?

• Graph A

• Graph B

• Graph C

• Graph D

Which prediction about the cricket population sizes at the end of the experiment is most likely correct?

• The population size will be larger in habitat 3 than in habitat 2.

• The population size will be larger in habitat 2 than in habitat 1.

• The population size will be larger in habitat 3 than in habitat 1.

• The population size will be larger in habitat 2 than in habitat 3.