Endosymbiosis
that is my explanation hopefully its right
Answer:
The amount of lipids stored as an energy reserve far exceeds the energy stored as glycogen since the human body is simply not capable of storing as much glycogen compared to lipids. Lipids yield 9 kcal of energy per gram while carbohydrates and proteins yield only 4 kcal of energy per gram.
Answer:
Read the Quran. it tells you how did it begin
The mitochondria is the site of respiration and energy production.