D. although protein was part of the composition of the foods in this experiment, it was not the main macromolecule component of the nut or the marshmallow. why do you think this type of food may have been left out, based on what you learned about the way the fuel is "burned" in the body?

Protein may have been left out, because, it is not used as energy in the body, and thus couldn't be measured in the experiment.

Hope this helps!!!

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.