Mitochondria convert the energy in the bonds of glucose and oxygen to readily available energy in the form of ATP (Adinoshin Tri Phosphate) with the help of oxygen. Mitochondria are often referred to as the powerhouse of cell.
Changes in groups of organisms over time produce variations in a population. This relates to both macroevolution and microevolution. These are evolutions within a small group or a population and across the whole species.
