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June 1996 LSAT Section 3 Question 20

With which one of the following statements concerning possible explanations for the latitudinal gradient in number of...

saraboles on February 28, 2023

Why is E not correct?

I thought E contained more of the author's main point regarding the hypothesis they support in the last paragraph.

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Emil-Kunkin on March 4, 2023

Hi, this is a very tough question.

I think the main issue with E is that we don't know anything really about local as opposed to regional competition. I think the author would agree that the advantage of the rate of speciation hypothesis is that it considers how species form on a regional level, and the author criticizes another theory on the ground that looking only at local ecology is not sufficient, but I don't think that we know enough about what it means to say local or regional competition.