In what way are autotrophic protists essential to the survival of aquatic ecosystems? A. They remove toxins from the water.

B. They produce extensive reefs.

C. They serve as the base of the food chains.

D. They convert nitrogen gas into ammonia.

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

Construct an explanation about the function of mitosis for multicellular organisms

Did you know that a blue wales tongue weighs more than an elephant?