Why can evolution in mosquitoes be more easily observed than evolution in a population of squirrels?

Mosquitoes have a short lifespan and often die quickly due to humans, animals, or environmental causes. They also reproduce in a way that makes it easy to mate and to have as many offspring as possible. And due to their short lifespans, mosquitoes mate a lot more than squirrels.
Squirrels have longer lifespans and life expectancy and mate more like us, in a breeding season.

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.