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 occurs in organelles called CHLOROPLASTS. More specifically, half of the photosynthesis chemistry stuff occurs in a liquid inside the chloropasts called STROMA, & the other half of photosynthesis occurs in stacks of membranes inside the chloroplast called GRANA. Turns out there are 2 types of chlorophyll, chlorophyll a & chlorophyll b.