What do scientists call a region of Earth that contains an unusually large number of species that are threatened by habitat loss?

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

How does the carbon cycle involve an exchange of carbon

How do disease caused by bacteria and disease caused by viruses react to antibiotics