Effects of Cycles on Ecosystems Answers

Fluctuations in the phosphorus cycle in aquatic ecosystems _______.a.can lead to changes in the growth rates of aquatic populationsb.are never caused by human impact on the environmentc.lead to a decrease in the amount of phosphorus found in sedimentd.never occur naturally

The desert relies on precipitation from weather patterns, while the rainforest can create its own precipitation.

How is carbon reintroduced into the atmosphere?a.respirationb.photosynthesisc.evaporationd.all of the above

Populations are positively and negatively affected by a variety of biotic and abiotic factors, including the cycles of matter. Every autumn between September and November, Canadian geese will migrate from their breeding grounds in Canada to warmer Southern locations. However, in the spring between February and March, the geese will return to Canada. Photo by Peter McDermott Which abiotic factor would likely have the greatest effect on Canadian geese migration? a. fluctuations in the carbon cycle b. fluctuations in the nitrogen cycle c. fluctuations in the phosphorus cycle d. fluctuations in seasons Please select the best answer from the choices provided

A large portion of precipitation in the rainforest occurs as a result of _______.a.perspirationb.respirationc.oxidationd.transpiration

Carbon is found only in living organisms.

Phosphorus is contained in _______. a. living organisms b. soil c. bodies of water d. all of the above Please select the best answer from the choices provided

Cycles are essential to all living organisms.

Where do animals obtain carbon?a.the atmosphereb.plant and animal consumptionc.the soild.photosynthesis

The cycling of carbon throughout the environment is critical to ensuring the survival of all organisms. Suppose a mountain lion kills a deer in the forest. Photo by US Department of Agriculture What would likely happen first to the carbon in the deer carcass as it lies on the forest floor after the mountain lion has finished feeding on it? a. It would be incorporated into other organisms. b. It would be released back into the atmosphere. c. It would be turned into coal. d. It would be incorporated into the soil. Please select the best answer from the choices provided