AP Biology : Understanding Eco-Chemical Cycles

Study concepts, example questions & explanations for AP Biology

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Example Questions

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Example Question #81 : Ecology

Which of the following best describes the cause of acid precipitation?

Possible Answers:

Sulfur dioxide and nitrogen oxide reacting with water in the atmosphere

None of these

Addition of hydrochloric acid to reserves of water

Sulfur dioxide and nitrogen oxide reacting with water in the atmosphere

Correct answer:

Sulfur dioxide and nitrogen oxide reacting with water in the atmosphere

Explanation:

Acid precipitation is a type of precipitation that is acidic, meaning that it has a pH of less that 7. Acid precipitation is caused by the reaction of sulfur dioxide and nitrogen oxide with water in the atmosphere, which produces acids. The production of sulfur dioxide and nitrogen oxide is directly linked with human industrialization.

Example Question #82 : Ecology

Which of the following is not a carbon reservoir?

Possible Answers:

Peat bogs

Coal

Atmospheric 

Forests

Glaciers

Correct answer:

Glaciers

Explanation:

Atmospheric , fossil fuels (including coal), peat, and organic material in a durable form (such as the cellulose of trees) are the reservoirs of the carbon cycle. Glaciers, on the other hand, are primarily water and are one of the reservoirs of the hydrologic (water) cycle.

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