How does the polymerase chain reaction make dna fingerprinting more reliable?

a. it allows scientists to use transgenic organisms in testing.
b. it allows scientists to use rna instead of dna for testing.
c. it allows scientists to quickly make many copies of dna.
d. it allows scientists to use bacteria to produce copies of dna.

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

How do antiviral drugs work? in your own words.

The united states produces an average of 429 billion pounds of food annually. about 133 billion pounds of that food ends up as waste.the percentage of food that the united states wastes each year is %.