PrepTest 78, Section 2, Question 9
In a recent field study of prairie plants, the more plant species a prairie plot had, the more vigorously the plants grew and the better the soil retained nutrients. Thus, having more plant species improves a prairie's ability to support plant life.
In a recent field study of prairie plants, the more plant species a prairie plot had, the more vigorously the plants grew and the better the soil retained nutrients. Thus, having more plant species improves a prairie's ability to support plant life.
In a recent field study of prairie plants, the more plant species a prairie plot had, the more vigorously the plants grew and the better the soil retained nutrients. Thus, having more plant species improves a prairie's ability to support plant life.
In a recent field study of prairie plants, the more plant species a prairie plot had, the more vigorously the plants grew and the better the soil retained nutrients. Thus, having more plant species improves a prairie's ability to support plant life.
The argument is most vulnerable to criticism on the grounds that it
infers of two correlated phenomena, X and Y, that X causes Y without considering whether Y causes X
fails to describe the mechanism by which productivity is supposedly increased
takes for granted that the characteristics of one prairie plot could reveal something about the characteristics of other prairie plots
bases a general conclusion on data that is likely to be unrepresentative
takes an increase in number to indicate an increase in proportion
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