The Mitochondria of a plant cell releases energy from the food. It is a cell organelle and is present in the cytoplasm. They make most of the essential ATPs (Adenosine Tri Phosphate).
Obviously on Earth :p nwm
Answer:
Because 2 forces are stopping the crate, friction and gravity. While only one force is trying to move it forward.
Diffusion , the movement of gas molecules .