In the experiment, the independent variable is the drug amount. Experiment group is given certain amount of drug, control group is not given the drug. The dependent variable is the body fat. I think you means the control is the living environment including food and water.
Answer:
Answer is A signal is sent down an exon within a nerve cell.
Explanation:
Homeostasis, because once the bird body temperature starts to overheat, it's body and mind work together to lower that body temperature down to normal
By the amount layers the epithelial tissue has