Amphibian populations are declining in numbers worldwide. Not coincidentally, the earth's ozone layer has been continuously deploeted throughout the last fifty years. Atmospheric ozone blocks UV-B, a type of ultraviolet radiation that is continously produced by the sun, and which can damage genes. Because amphibians lack hair, hide, or feathers to shield them, they are particularly vulnerable to UV-B radiation. In addition, their gelatinous eggs lack the protection of leathery or hard shells. Thus, the primary cause of the declining amphibian population is the depletion of the ozone layer.
Each of the following, if true would strengthen the argument EXCEPT:
A)Of the various types of radiation blocked by atmospheric ozone, UV-B is the only type that can damage genes.
B) Amphibian populations are declining far more rapidly than are the populations of non-amphibian species whose tissues and eggs have more natural protection from UV-B.
C) Atmospheric populations are declining far more rapidly than are the populations of non-amphibian species whose tissues and eggs have more protection from UV-B.
D) The natural habitat of amphibians has not become smaller over the past century.
E) Amphibian populations have declined continuously for the last 50 years.
Each of the following, if true would strengthen the argument EXCEPT:
A)Of the various types of radiation blocked by atmospheric ozone, UV-B is the only type that can damage genes.
B) Amphibian populations are declining far more rapidly than are the populations of non-amphibian species whose tissues and eggs have more natural protection from UV-B.
C) Atmospheric populations are declining far more rapidly than are the populations of non-amphibian species whose tissues and eggs have more protection from UV-B.
D) The natural habitat of amphibians has not become smaller over the past century.
E) Amphibian populations have declined continuously for the last 50 years.
