Answer:
Low concentration to high concentration
Explanation:
If moving up the concentration gradient, you will start detecting the chemical molecules more and more frequently.
A) The data to support his hypothesis, so he should investigate if the same change happens in the density of solid water.
Nutrients entering a cell through the cell membrane Removing a phosphate group from an ATP molecule Building sugar or starch molecules for long-term energy storage Adding an additional phosphate group to an ADP molecule.