Asked by jay
What best describes the association between the carbon cycle, plants, and animals?
Plants fix carbon and release oxygen, and animals release carbon and use oxygen.
Animals fix carbon and release oxygen, and plants release carbon and use oxygen.
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The first statement is correct: plants fix carbon and release oxygen, and animals release carbon and use oxygen.
Explanation: plants use photosynthesis to take in CO2 and convert (fix) it into organic carbon, producing O2 as a byproduct. Animals (and other heterotrophs) consume oxygen to respire, breaking down organic carbon and releasing CO2. (Note: both plants and animals respire and release some CO2, and decomposition and human activities also move carbon through the carbon cycle.)
Explanation: plants use photosynthesis to take in CO2 and convert (fix) it into organic carbon, producing O2 as a byproduct. Animals (and other heterotrophs) consume oxygen to respire, breaking down organic carbon and releasing CO2. (Note: both plants and animals respire and release some CO2, and decomposition and human activities also move carbon through the carbon cycle.)
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