Q)
Amphibian populations are declining in numbers worldwide. Not coincidentally, the earth's ozone layer has been continuously depleted through the last 50 years. Atmospheric ozone blocks UV-B, a type of ultraviolet radiation that is continuously 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 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 nonamphibian species whose tissues and eggs have more natural protection from UV-B
C. Atmospheric ozone has been significantly depleted above all the areas of the world in such amphibian populations are declining.
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.
A가 답 인것은 알겠어요. Gene damage가 파충류 감소를 뜻하는것은 아니니깐요..
그런데 D는 왜 strengthen이 되는것인가요?
not smaller는 서식지가 같거나 더 넓어졌다는 것인데, 서식지가 넓어졌다는 것은 오히려 개체수가 증가했다 라고 이해하는것이 맞을테고, 예전이랑 서식지가 같다 또한 파충류의 개체수가 예전과 같으면 같았지 줄어들었다고 이해하기는 좀... 본문에는 개체수가 줄어들었다. 라고 했으니 이것은 확실한 fact 이고.. 그렇다면 D는 아무리 생각해도 strengthen은 아닌것 같아서요.. Weaken or out of scope같거든요..
덧글) 오존층이 얇아져서 서식지에 도움이 되는 UV들이 많이 통과가 되어 서식지가 줄어들지 않았다.
그래서 strengthen 인건가요?? 그렇다 하더라도 파충류의 개체수가 줄어들었느데 서식지가 줄어들지 않았다. 이것도 조금은 억지 같은데... 억지로 이해 하려니 힘드네요. 도와주세요.ㅠㅠ