Name three human body systems

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline. which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

Which of the following human activities resulted in the growth of the north american deer population?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?