group 4 because they are the group that nothing is happening to. they are what the scientists will compare the results back to.
hope that helps!
Four groups of rats are tested in a lab. Group 1 is given a special hornmone for muscle growth. Group 2 is given a special multivitamin diet. Group 3 receives both the hormone treatment and the multivitamin diet. Group 4 does not receive any extra treatment or special diet. which of the groups is the control group for this experiment? Explain your reasoning.
2 answers
thank you
1 answer