Logical Reasoning

PT130 · S4 · Q13 Adult frogs are vulnerable

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Adult frogs are vulnerable to dehydration because of their highly permeable skins.

Facts

causal (because of, most important factor)

Highly permeable >> vulnerable to dehydration skin

moisture requirements >> where frogs can live

comparisons

Small adults have such low body / surface area ratio that they can't survive in arid climates. Large adults have a higher ratio and can survive.

N. Yucatan: arid S. Yucatan: wet

Evaluate

Other than the obvious overlap of talkin' frogs (also the name of my new podcast), there's a lot of talk about moisture / climate.

Frogs are vulnerable to dehydration. They want wetter climates. We know small adults can't survive in arid (dry) areas, and we're told that N. Yucatan is arid, so our most solid inference is small adults don't live in north Yucatan.

Goal

It gets a little more speculative to start talking about where larger adult frogs live. We know that they are less vulnerable to dehydration than the smaller ones, so maybe they can tolerate north Yucatan's arid climate, but who knows.

Let's look for the most provable answer.

13.

The information above most strongly supports which one of the following conclusions about frogs in the Yucatán peninsula?

  1. Large adult frogs cannot coexist

    Too Strong (can't coexist)

    We have no reason to think that large and small frogs can't coexist.

    3% picked this

  2. Frogs living in wet areas

    Support Against

    The statements actually support the idea that the average weight of frogs in arid northern areas is greater than the average for wet southern areas.

    5% picked this

  3. Correct

    Large adult frogs can live

    Why this is right

    Large adult frogs have fewer limitations on where they can exist on the Yucatan peninsula and so can live in more of the area than small adult frogs. Large adult frogs can live in both the wet southern areas and more of the arid northern areas, while small adult frogs cannot live in the arid northern areas. This doesn't overstep its bounds by claiming that large adult frogs do live in more areas; it's just saying they can.

    Skill tested: Most Supported · how this choice captures the argument's function is the move to repeat next time.

    82% picked this

  4. Fewer small adult frogs live

    Unsupported Comparison

    The number of large adult frogs and small adult frogs living in each area is not discussed in the statements.

    4% picked this

  5. Small adult frogs in the

    Unsupported Comparison

    The statements do not support a comparison of the permeability of the skin of one size frog to another or of the permeability of the skin of frogs in one area to another.

    6% picked this

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