Reading Comprehension
试题详情
文章：
题目：
Which of the following, if true, would most clearly support the argument about keystone status advanced in the last sentence of the passage (lines 24–31)?
选项:
A、A species of bat is primarily responsible for keeping insect populations within an ecosystem low, and the size of the insect population in turn affects bird species within that ecosystem.
B、A species of iguana occupies a keystone role on certain tropical islands, but does not play that role on adjacent tropical islands that are inhabited by a greater number of animal species.
C、Close observation of a savannah ecosystem reveals that more species occupy keystone roles within that ecosystem than biologists had previously believed.
D、As a keystone species of bee becomes more abundant, it has a larger effect on the ecosystem it inhabits.
E、A species of moth that occupies a keystone role in a prairie habitat develops coloration patterns that camouflage it from potential predators.
答案:
B
