CO2 and H2O will not form glucose on their own because ____
a. CO2 does not contain sufficient energy
b. H2O does not contain sufficient energy
c. neither CO2 nor H2O contain sufficient energy
d. the concentration of CO2 is too low in the atmosphere
e. the bonds of CO2 and H2O are too stable to be broken without an input of energy
ANSWER: e
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