Biology CP CFA #1

Front

Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?

Back

There is less available energy in the fourth trophic level because of the loss of energy through metabolism in each of the lower trophic levels.

Front

Which organism receives the least amount of energy from the producers? Options: Hawk, Rabbit, Grasshopper, Mouse

Back

Hawk

Front

The removal of which group would cause an immediate decrease in the amount of energy flowing through an ecosystem?

Back

Producers

Front

Which of these organisms would most likely be found at the top of an energy pyramid? Options: clams - a primary consumer, sardines - a primary consumer, sharks - a secondary consumer, kelp - a primary producer

Back

sharks - a secondary consumer

Front

Which of the following statements is true about ecological pyramids?

• Consumers form the bottom levels of both the energy pyramid and the biomass pyramid.
• Producers are at the bottom level of both the energy pyramid and the biomass pyramid.
• Producers are at the bottom of the energy pyramid, but at the top of the biomass pyramid.
• Producers are at the bottom of the energy pyramid, but at the top of the biomass pyramid.

Back

Producers are at the bottom level of both the energy pyramid and the biomass pyramid.

Front

A hawk eats a mouse that lives in an ecosystem where there is 10,000 kcals of energy in the grasses that the mouse consumes. How much energy, in kcals, moves up to the trophic level the hawk is in?

Back

100 kcals

Front

An owl eats a rat that lives in an ecosystem where there were 2,800 kcals of energy in the insect population that the rat consumed. How many kcals would transfer to the trophic level the owl is in?

Back

28

Front

If primary consumers have 650 kcals of energy available to them in the producers they eat, how many kcals of energy make it into the primary consumer trophic level?

Back

65

Front

What percent energy from the producers is available to primary consumers?

Back

10%

Front

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival? Options: 80%, 90%, 10%, 20%

Back

90%