BIOWEB
nverdae@nvcc.edu
Emma Erdahl, Associate Professor of Biology
Northern Virginia Community College
Revised 8/23/00
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12. Given that CO2 is produced by cellular respiration, why does the amount of CO2 in the atmosphere remain relatively constant? a. CO2 is converted in photosynthesis to carbohydrates. b. CO2 is split apart during photosynthesis. c. A significant amount of CO2 forms carbonate rocks. d. Most CO2 is trapped in dead organisms’ bodies. Today it is thought that this answer is not entirely true. Due to a number of human activities including destruction of tropical rain forests and the burning of fossil fuels, the amount of carbon dioxide in the atmosphere is increasing. Read about the greenhouse effect on page 808 of your text. |
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