Are there more than one air mass if so. plz

Yes because as you go up in the atmosphere the air get thinner

Yes . an air mass is a block of air that causes change in weather in other countries . There are 5 main air masses . These are called Tropical Maritime ( which is associated with hot and wet weather and comes from Portugal ) , Tropical continental  ( hot and dry from Africa ) , Polar Maritime ( cold and wet from the Atlantic  ocean ) , Polar Continental ( cold and dry from Russia ) and Arctic Maritime ( Cold and dry from the Arctic ocean ) .

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.

The correct answer is b