A carrot plant is exposed to carbon dioxide containing radioactive carbon for 24 hours. After this exposure, the the carrot roots are found to have accumulated radioactivity. These carrots are then fed to a rabbit. One week later, the rabbit's tissue is tested for radioactivity and is found to have a higher than normal background count. which biogeochemical cycle is apparent from this study ?

A carrot plant is exposed to carbon dioxide containing radioactive car

1.	A carrot plant is exposed to carbon dioxide containing radioactive carbon for 24 hours. After this exposure, the the carrot roots are found to have accumulated radioactivity. These carrots are then fed to a rabbit. One week later, the rabbit's tissue is tested for radioactivity and is found to have a higher than normal background count. which biogeochemical cycle is apparent from this study ?
A.	Oxygen
B.	Mineral
C.	Water
D.	Carbon
Answer» E.

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