One type of evidence supporting a common ancestor is the existence of similar traits in related organisms that are functional in some species but not in others, such as the tailbone in humans. What is the term used to describe the nonfunctional traits

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.

Very hard to understand

Ithink the answer is c. i’m not sure though i’ll notify you when i have an exact answer!