Independent: The second group is not given the drug.
Dependent: Dr. Smith wants to examine weather a new drug increases the maze running performance of older rats.
Constants: Dr. Smith teaches two groups of older rats to find a piece of tasty rat chow in the maze.
The <span>corpus callosum allows the right and left hemispheres of the brain to communicate. </span>
A mutation that results in a change in one amino acid is called a MISSENSE mutation. I hope this helped!