Food Webs & Energy Transfer

Front

Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem? Options: There is less energy available in the producers because their tissues are less dense than those at higher trophic levels. There is more energy available in the second trophic level because less energy is needed for hunting compared to the higher trophic levels. There is more available energy in the birds of prey because they have greater muscle mass for storing energy than organisms in lower trophic levels have. 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.

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? Options: Producers, Consumers, Decomposers, Inorganic nutrients

Back

Producers

Front

Complete burning of plant material returns carbon primarily to the

Back

atmosphere

Front

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

Back

sharks - a secondary consumer

Front

What will most likely happen if decomposers are removed from the carbon cycle in a terrestrial ecosystem?

Back

The amount of carbon dioxide in the atmosphere will decrease.

Front

How does water released from plants during transpiration enter the atmosphere? Options: condensation, precipitation, evaporation, capillary action

Back

evaporation

Front

Processes involved in the cycling of carbon within an environment.

Back

photosynthesis and respiration

Front

Which of the following statements is true about natural systems?
- 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

Jill made the table below during her research on aquatic zones and living organisms. Based on Jill’s observations, which conclusion could you draw?

Back

There are no producers in the benthic zone that rely on photosynthesis