Move the bonfire to the left side of the sand. Observe how the smoke from the bonfire moves. Record your observations in Table C in the Student Guide.
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TOOLS
Bonfire

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.