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Exam 22: Biogeochemical Cycles

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Question 41

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Which of the following nutrients is produced by photosynthesis?

A) nitrogen
B) phosphorous
C) oxygen
D) sulfur

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Question 42

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The element ________ is a basic constituent of all organic compounds and is involved in the fixation of energy by photosynthesis.

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Question 43

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Describe three ways that nutrients can be lost from an ecosystem.

Which of the following is NOT a major reservoir for phosphorus?

Which of the following does NOT cause a loss of nutrients from an ecosystem?

There is more carbon per unit of soil in cold polar regions than in the warm tropics.

Describe how atmospheric carbon dioxide levels fluctuate daily, seasonally, and geographically. Explain why such fluctuation occurs.

Atmospheric sulfur dioxide returns to Earth in rain as weak sulfuric acid.

The ________ is the largest pool of nitrogen.

In ________ biogeochemical cycles, the main reservoirs of nutrients are the soil, rocks, and minerals.

Explain the difference between the two basic types of biogeochemical cycles, using specific examples of each.

Describe a pathway of nitrogen from the atmosphere into the body tissue of an herbivore.

Without the cycling of water, biogeochemical cycles would cease.

Which of the following nutrients is most closely linked to the energy cycle in ecosystems?

The ability of the surface waters of the ocean to take up carbon dioxide is governed by the reaction of carbon dioxide with the ________ ion to form bicarbonates.

The sulfur biogeochemical cycle is a sedimentary cycle with essentially no gaseous cycle.

In the era post-nuclear testing (after the 1950s), there was a movement to switch from breast-feeding to a formula diet due to the high levels of radiation in breast milk.

All nutrients flow from the nonliving, to the living, and back to the non-living components of the ecosystem in a path known as a(n)________ cycle.

Nutrients with a sedimentary cycle enter the ecosystem via the atmosphere.