다음 글의 요지로 가장 적절한 것은?Dr. Roossinck and h… | [9급 지방직 영어] 23년 1회차 기출문제 상세 페이지

다음 글의 요지로 가장 적절한 것은?
Dr. Roossinck and her colleagues found by chance that a virus increased resistance to drought on a plant that is widely used in botanical experiments. Their further experiments with a related virus showed that was true of 15 other plant species, too. Dr. Roossinck is now doing experiments to study another type of virus that increases heat tolerance in a range of plants. She hopes to extend her research to have a deeper understanding of the advantages that different sorts of viruses give to their hosts. That would help to support a view which is held by an increasing number of biologists, that many creatures rely on symbiosis, rather than being self-sufficient.

Viruses demonstrate self-sufficiency of biological beings.

Biologists should do everything to keep plants virus-free.

The principle of symbiosis cannot be applied to infected plants.

Viruses sometimes do their hosts good, rather than harming them.

글의 요지로 가장 적절한 것은 "Viruses sometimes do their hosts good, rather than harming them."(바이러스는 숙주를 해치기보다 때로 이롭게 한다)이다.
지문은 바이러스가 식물의 "resistance to drought"(가뭄 저항성)와 "heat tolerance"(내열성)를 높인 실험 결과를 소개하고, 연구자가 "the advantages that different sorts of viruses give to their hosts"를 더 깊이 이해하려 한다고 설명한다. 즉 바이러스가 숙주에게 주는 이점이 핵심이다.
"Viruses demonstrate self-sufficiency of biological beings."(바이러스는 생물의 자급자족성을 보여 준다)는 생물이 "self-sufficient"하기보다 공생에 의존한다는 지문과 반대다.
"Biologists should do everything to keep plants virus-free."(식물을 바이러스로부터 지켜야 한다)는 바이러스의 이점을 다룬 내용과 상반된다.
"The principle of symbiosis cannot be applied to infected plants."(공생의 원리는 감염된 식물에 적용될 수 없다)는 연구가 공생 관점을 뒷받침한다는 지문과 어긋난다.