Aldehydes and Ketones. Aldehydes and ketones are classes of organic compounds that contain a carbonyl (C=O) group.
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A
Explanation:
The letter A is the correct answer
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gravitational energy
Explanation:
It is gravitational (potential) energy because of the place that the rock holds in the gravitational field. It has <u>potential</u> to move downward, because of <u>gravity</u>.
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because they cannot keep their body temperature constant.
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<em>reversible redox reaction</em>
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