Which statement about the difference between autotrophs and heterotrophs is true? A. Autotrophs transform radiant energy into chemical energy, but heterotrophs can’t. B. Autotrophs take in only oxygen, but heterotrophs take in both oxygen and carbon dioxide. C. Autotrophs have two different electron transport systems, but heterotrophs have none. D. Autotrophs don’t have a Calvin cycle, but heterotrophs do.

A. Autotrophs transform radiant energy into chemical energy, but heterotrophs can’t

Explanation:

Autotroph produce their own nutrition by absorbing sunlight in addition to water and carbon dioxide while heterotrophs have to feed on other organisms to survive.

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it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.