The people of many countries of the world measure temperature in degrees celsius. the celsius scale is based on two main points—0°c and 100°c. these points represent

The answer is A.the freezing point of water and the boiling point of water. 
Fahrenheit based his scale on the coldest temp he could obtain, a mixture of snow and salt. He figured that boiling was somehow opposite freezing in the same way that one side of a circle is opposite the other, so he put the two 180 degrees apart. By that scale, he determined that the coldest temperature he could obtain, a mixture of snow and salt, was 32 degrees below the freezing point of water, and he set that as his zero point. Yes, scientists get goofy like that sometimes. 

That means a centigrade degree is 1.8 times as big as a Fahrenheit degree, and Fahrenheit is offset from Celsius by 32 degrees. So to convert from C to F you use F = 1.8C + 32 and to go the other way you use C = (F - 32)/1.8 Both scales are equal at -40 degrees.

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.