9-0 sistema ABO é um exemplo clássico de poliatelia, pois três alelos diferentes determinam quatro diferentes tipos
sanguíneos. Uma pessoa de sangue tipo A deve apresentar
qual genótipo sabendo-se que seu pai era do tipo 0?

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