What is the primary source of carbon that can be used by plants?

What is the primary source of carbon that can be used by plants?



A - Carbon dioxide in the atmosphere
B - Dead organic material
C - Calcium carbonate
D - Inorganic carbon in the soil
E - Carbon dioxide dissolved in water


Answer: A - Carbon dioxide in the atmosphere
The primary source of carbon for plants is in the atmosphere because carbon dioxide is a gas that can move freely through the air and water.


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