When comparing today's animals to the ones from the Mesozoic era, which is true? A. only a few of the animals from the Mesozic era are
extinct

B. most of the animals from the Mesozoic era are extinct

C. dinosaurs still roam the Earth

D. all of the animals are still the same

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

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes