Like all cells, the cell shown in the diagram below requires energy to carry out life processes.

a) chemical energy is used to synthesize sugars from oxygen and carbon dioxide.

b) light is used to synthesize sugars from water and carbon dioxide.

c) light and chemical energy are used to breakdown sugars and other molecules in the presence of carbon dioxide.

d) sugars and other molecules are broken down in the presence of oxygen to produce the energy storage compound atp.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.