How does myelination affect the signal transmission of a neuron

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

Several billion years ago which gas was the least prevailant in the atmosphere

Number and variety of living organism; includes genetic, species, and ecological types