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
The sun is the ultimate source for energy on the Earth.
The need for energy, gained by respiration and photosynthesis, is the driving force of the oxygen cycle.
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
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
In the BOREAS study, scientists are trying to determine if a large amount of carbon is being taken in by what biome?a.rainforestb.tundrac.boreal forestd.desert
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?
Where is the water stored during the water cycle?a.the atmosphereb.the groundc.the oceand.all of the above
Photolysis is a part of which cycle?a.phosphorusb.oxygenc.nitrogend.carbon
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
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