Biological structures like DNA, proteins and cells all depend on molecules. ... Neurotransmitters like epinephrine are pretty simple molecules, but without them our nervous system couldn't work. Oxygen, containing just two oxygen atoms, is a very simple molecule, and it is certainly essential to living things.
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Potential Energy.Hope it helps ☺️
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producers make their own energy
C) transporting glucose to the cells where it is broken down and energy is released.