Which of these is not a process of mechanical weathering? dissolving of limestone which makes caves tree roots ice potholes

Dissolving limestone is not a process of mechanical weathering. Mechanical weathering is the process which physically disintegrates rock. This would be defined as CHEMICAL weathering instead.

The answer is A dissolving of limestone which makes caves hope this helps

Where is the picture at

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.