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Bio multimple choice question-demanding

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mr_scholes:
36  The diagram represents part of the carbon cycle.
 

carbon dioxide in air <--carbon compounds in animals(X)<-----carbon compouds in green plants(y)



 
What processes are represented by X and Y?
             X                       Y
A)  combustion            photosynthesis
B)  photosynthesis        respiration
C)  respiration              excretion
D)  excretion                 nutrition

kam:
i dont get the diagram but the way i see it is tht its A
can u give me which year so i can see the diagram clearly

xTremep:
it is D

Wahab09:
Its A!..
Quite a trick question but all the other answers seem to be wrong!

So i think its A cuz plants get CO2 by photosynthesis and animals eat plants and use the food they ate and when they die in a 10000000 years they get combusted to give out CO2.. ::)

Wahab09:
Or wait a second..
it IS D
+ rep for u xTreme.. well observed

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