Question

The bodies of all living things are based on carbon. Which of the following is the primary source of carbon in living things?

A.
carbon compounds in the soil
B.
carbon compounds stored in fossil fuels
C.
dissolved carbon dioxide in the biosphere
D.
carbon dioxide in the atmosphere

Answer 1

C or D

Carbon Dioxide (CO2) in the air or dissolved in water is the source of carbon found in living stuff through the process of photosynthesis which converts the carbon dioxide and water into simple carbohydrates algae and green plants (producers) are the primary agents of carbon dioxide fixation.