Analyst: A recent survey showed that although professors of biology who teach but do not pursue research made up one twentieth of all science professors, they were appointed to fewer than one twentieth of all the scientific administrative positions in universities.
Conclusion
University administrators tends to be biased against appointing professors to scientific administrative positions, if those professors have failed to pursue research.
Evidence
In a survey, it was found that bio professors who haven't pursued research are disproportionately underrepresented among all scientific administrative positions in universities.
They're 1/20 of all science professors, but they fill less than 1/20 of sci admin positions.
Evaluate
Disproportionate representation is one of those asymmetric Comparisons we refer to as a Curious Fact. The author's conclusion offers an Explanation.
Curious Fact ... why are bio professors who don't pursue research underrepresented in scientific admin positions?
Author's Explanation ... it's cuz they haven't pursued research. The people at the university who decide on whom to appoint to this scientific admin positions are biased against professors who haven't pursued research.
Goal
Since this is Weaken, we're expecting a correct answer to
1. Suggest an Alternate Explanation for why these research-less bio professors are under-appointed to scientific admin positions or 2. Undermine the plausibility of the Author's Explanation, making it seem like university higher-ups are not biased against professors who haven't pursued research.