The bottom driver is like the suspension for the sled, resulting in a smoother travel. And yes, the handles for the bottom athlete are significant too. The top man who sees the track signals the man in bottom (mostly using head movement) to help steer.
The two reactions which occur during photosynthesis are light  reaction and dark reaction. Light reaction takes place only in the  presence of light. Dark reaction can occur â¦ with or without light. 1 person found this useful.
Photosynthesis takes place in the cell's chloroplast in two stages: the light stage and the dark stage. Each stage occurs in a different part of the... Photosynthesis takes place in the cell's chloroplast in two stages: the light stage and the dark stage. Each stage occurs in a different part of the chloroplast. In the light stage of photosynthesis, the chloroplast absorbs the light of the sun. This sets off a series of chemical reactions, beginning by converting the sunlight to chemical energy. According to About.com, three types of energy are produced: ATP, NADPH and oxygen, all of which are used in the dark stage of photosynthesis.