- Dustin Lee Biology Block C Carbon-Oxygen Cycle 1 These two linked cycles provide plants and animals with energy and the materials for the basic

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Dustin Lee 9/25/2006 Biology Block C Carbon-Oxygen Cycle 1. These two linked cycles provide plants and animals with energy and the materials for the basic building blocks of life. Carbon and oxygen have independent cycles, but often travel together. Carbon, oxygen, nitrogen, and hydrogen are bonded together and form biomolecules—that is, carbohydrates, proteins, and lipids. Carbon © is found in all living things in biomolecules. It is also found in the atmosphere, as carbon dioxide (CO 2 ). Oxygen (O 2 ) makes up 21% of Earth’s atmosphere and is found dissolved in fresh and ocean waters. 2. In the process of photosynthesis, plants take in water from the soil and carbon dioxide from the air. They are converted into biomolecules such as sugars or carbohydrates. The byproduct—oxygen—is released into the air. 3. In the process of respiration, all living things (including plants) use oxygen to “burn” sugars, producing water and releasing carbon dioxide as a byproduct into the air. 4. Animals eat plants or other animals and break down the consumed organism’s complex biomolecules into simpler biomolecules, releasing energy that is now available for the consumer. 5. As land animals and plants die, decomposers use oxygen from the air or soil to break down the dead organisms’ carbon-containing biomolecules, and carbon
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This note was uploaded on 09/21/2011 for the course BIOG 1110 taught by Professor Randywayne during the Spring '09 term at Cornell University (Engineering School).

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- Dustin Lee Biology Block C Carbon-Oxygen Cycle 1 These two linked cycles provide plants and animals with energy and the materials for the basic

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