Which of the following are not abiotic factors of an ecosystem? a. water abundance b. temperature c. day length d. herbivores

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

What re the two main phrases of the cell cycle.

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers