Question

recently published book, invasion biology. davis writes in his its amazing how extensive the indoctrination has been: nonnative species are bad - weve got to get rid of them, says davis, chairman of the biology department at macalester college in st. paul, minnesota. boy, if you want nature to stop, youre going to be miserable. davis and his like - minded colleagues contend that the rigid attitudes, and militaristic metaphors, that characterize the debate about exotic species make for poor science and policy - making. from greg breining, courting controversy with a new view on exotic species. ©2008 - 2015 by yale university. passage 2 off the top of his head, dan simberloff, professor of ecology and evolution at the university of tennessee, can run through a list of devastating invasive species from brazilian pepper in florida to gray squirrels in the u.k. to zebra mussels clogging water pipes in the great lakes. he says that daviss argument that not all exotics are invasive is impractical. a number of introduced species have been innocuous for decades and they can suddenly explode and become problematic, he says. he points to the example of ornamental figs in florida, which arrived in the early 1900s. confined to backyards until their pollinating wasp showed up 25 years ago, figs have now invaded everglades national park. other ecologists have taken a more nuanced view of the invasive question. the extent of their harm may have been overstated, says princetons david wilcove, who first tallied up the threat of invasive species and still stands by it. maybe the issue is: are we being strategic in the way we combat invasive species? and i think thats a fair question. adapted from brendan borrell, alien invasion? an ecologist doubts the impact of invasive species. ©2009 by scientific american, a division of nature america, inc. question based on the information in the two passages, on which of the following points about nonnative species are davis and simberloff most likely to agree? the scientific community is being strategic in the way it combats nonnative species. some nonnative species can cause harm to the native ecosystems they inhabit. scientists can easily determine whether a nonnative species will cause problems to a new environment. buckthorn poses less of an environmental threat than zebra mussels do.

Explanation:

In Passage 1, Davis acknowledges the negative perception of non - native species. In Passage 2, Simberloff lists examples of non - native species causing harm. Both suggest that some non - native species can be harmful to native ecosystems.

Answer:

B. Some nonnative species can cause harm to the native ecosystems they inhabit.