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 is performed in two stages: Light reactions (or light-dependent reactions): Energy from sunlight is required. Dark reactions (or light-independent reactions): â¦ No sunlight is required. However, energy formed by the light-dependent reactions is needed. 11 people found this useful.