The term metabolic rate reflects the . loss of energy to perspirationb. energy needed to make all organic moleculesc. energy the body needs to perform only its most essential activitiesd. loss of organic molecules in urine

The term metabolism is best defined as .

biochemical reactions involved in building cell molecules or breaking down molecules for energy

Metabolic rate is the rate of metabolism, the amount of energy used by an animal per unit of time. Basal metabolic rate (BMR) is the amount of energy used daily by animals at rest.

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.

The hawk receives 0.1% energy from the caterpillar although the caterpillar gets eaten by another bird smaller than the hawk first