Photosynthesis and Cellular Respiration Answers

Which of the following two cycles are the most closely related in their role in sustaining life?a.carbon and nitrogenb.water and nitrogenc.carbon and oxygend.nitrogen and phosphorus

Which of the following does not cycle into the atmosphere? a. the carbon cycle b. the phosphorus cycle c. the nitrogen cycle d. the oxygen cycle Please select the best answer from the choices provided

Biogeochemical cycles recycle water and natural elements throughout the biosphere to ensure that organisms do not run out of these substances. Thiobacillus denitrificans is a specialized species of bacteria that obtains its energy from carbon dioxide and inorganic nitrogen-containing compounds such as nitrates in its environment. It is used in the bioremediation of groundwater that contains excess nitrate. How does Thiobacillus denitrificans help bioremediate groundwater?

Which of the following does not take place in the water cycle? a. precipitation b. evaporation c. carbonation d. condensation

Which of the following statements is true? a. The nitrogen cycle is the most important cycle for life. b. The oxygen cycle is the least important cycle for life. c. Life can be sustained without any of the cycles for life present. d. All cycles of matter are equally important for life to be sustained. Please select the best answer from the choices provided

What percentage of precipitation falls back onto land? a. 78% b. 92% c. 17% d. 22% Please select the best answer from the choices provided

The carbon cycle involves an exchange of carbon between the atmosphere and geosphere only.

Biogeochemical cycles recycle water and natural elements throughout the biosphere to ensure that organisms do not run out of these substances. Diagram by NASA/Kevin Saff Diagram by Ilmari Karonen Which of the following processes plays an important role in cycling carbon, nitrogen, and phosphorus?

Photolysis is a part of which cycle?a.phosphorusb.oxygenc.nitrogend.carbon

Biogeochemical cycles on Earth serve a variety of different purposes. What do the biogeochemical cycles have in common? a. They all serve the same function in sustaining life on Earth. b. They all include only nonliving components of an ecosystem. c. They are all essential for sustaining life on Earth. d. They all include only living components of an ecosystem. Please select the best answer from the choices provided