Which of these is the correct method to test the odor of an unknown chemical?

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

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 is required of a new drug?me