Our elbow bends all the time, we bend it when we pick up things, when we eat, when we do mostly everything. Cows on the other hand dont pick up food with there feet, they use there mouths, and they probably only bend when they are walking.
Cell wall is the structure in the leaf cell that is responsible for this difference.
The atsmoshpere works as Earths blanket to trap in uv rays from the sun.
Answer:
A diver on a diving board has kinetic energy equaling zero, but potential energy proportional to the distance between the board and the water. If When the diver dives leaves the platform, he begins losing potential energy because he's nearing the water.
Answer:
I believe it is the Mitochondria