What is expected to happen to the number of people sixty years and older in the developed world by the year 2050? to what can this be attributed? (site 1)

By the year 2050 the number of people aged 60 years and older will significantly increase by more than 1 billion.

This is attributed to better medical conditions, healthier lifestyles, advances in bio-tech etc.

In Europe, already 25% of the population is 60 and above and number is also rising in Japan.

By 2050 we will be able to see similar patterns emerge in more populous nations such as China, Pakistan and Nigeria.

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.