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.
overview of Photosynthesis stAGe 1: Light-Dependent reactions 1 energy from sunlight is absorbed. Water mol-ecules are broken down and oxygen is released. stAGe 2: Light-independent reactions 6h2o chloroplast sunlight chloroplast (the plant cell organelle where photosynthesis takes place) 6o2 3carbon dioxide molecules are used to build sugars.