You freeze an enzyme and then warm it gently without passing the optimum temperature. What will happen to its activity A. The activity will speed up then decrease to zero
B. The activity will speed up
C. Activity will not be affected at all
D. There will be no activity

What arrow on the map points to an air mass moving toward a cold front

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called