Ecologist: Nonnative species probably have much more difficulty becoming established in robust, diverse ecosystems than in other ecosystems. An invasive species suited for a particular ecosystem that is already occupied by a wide variety of native species cannot become established unless it outcompetes the native species in that ecosystem.
Which of the following, if true, would most weaken the ecologist’s argument?

Question

Examsnet · Accepted Answer

Correct Answer is :  Even if nonnative species have far more difficult becoming established in robust, diverse ecosystems, many succeed in doing so

GMAT Verbal Reasoning Practice Test 7