During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level?
A. NADH
B. ATP
C. ADP + Pi
D. FADH2
E. None of the above
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none?

Explanation:

if this is wrong, sorry. im about to get 400 points for this

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.

the answer is b.) hydrogen bonds between bases.