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Chapter 46: Q19 (page 1369)

Carbon is present in the atmosphere as ________. a. carbon dioxide b. carbonate ion c. carbon dust d. carbon monoxide

Short Answer

Expert verified

The correct option is a. carbon dioxide .

Step by step solution

01

Step 1. Given information

Carbon is the second most abundant element in living organisms. Carbon is present in all organic molecules, and its role in the structure of macromolecules is of primary importance to living organisms.

02

Step 2. Explanation

The correct option is a. carbon dioxide .

The carbon cycle is most easily studied as two interconnected sub-cycles: one dealing with rapid carbon exchange among living organisms and the other dealing with the long-term cycling of carbon through geologic processes.

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