When the adrenal gland is in a state, the amount of cortisol production drops below the normal level, and the amount of sugar available to the cells is reduced. With less sugar, less energy is available to the body, and fatigue is experienced.
The higher the temperature then typically the greater the rate of photosynthesis, photosynthesis is a chemical reaction and the rate of most chemical reactions increases with temperature. However, for photosynthesis at temperatures above 40Â°C the rate slows down.
If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot. If you plot the rate of photosynthesis against the levels of these three limiting factors, you get graphs like the ones above. In practice, any one of these factors could limit the rate of photosynthesis.