A student is investigating magnetic fields. The picture shows what happens when the student drops iron filings on a bar magnet. The student claims that the magnetic fields are not the
same across the magnet. Using the picture, what evidence best supports the claim?

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.

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.

What is it that you need with?