PT130.S4.Q13

PrepTest 130 - Section 4 - Question 13

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

Stimulus Summary

The stimulus gives us some facts about frogs. Adult frogs' skin makes them vulnerable to dehydration. This affects large adult frogs and small adult frogs differently. Small adult frogs' low body weight to skin surface area ratio means they can't survive in arid climates:

small → /arid

Frogs' need for moisture is the main factor that determines where they can live on the Yucatán peninsula, which is arid in the north and wet in the south.

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13.

The information above most strongly ████████ █████ ███ ██ ███ █████████ ███████████ █████ █████ ██ ███ ████████ ██████████

a

Large adult frogs ██████ ███████ ████ █████ █████ █████ ██ ███ ███ ██████

Incorrect. The stimulus implies that large adult frogs can survive in more arid areas than small adult frogs, but not that wetter areas would somehow be a problem for large frogs. If anything, the stimulus suggests that large adult frogs can coexist with small frogs in wet areas, as well as being able to survive in more arid regions.
1%
b

Frogs living in ███ █████ █████ ████ ██ ███████ ████ █████ ██ ███ ████ ██████

Incorrect. Nothing in the stimulus leads us to expect (B). In fact, based on the stimulus, we would expect that the average weight of frogs in wet areas would be lower, since the wet areas are where small adult frogs can survive, whereas frogs that can survive in arid areas would be larger on average.
4%
c

Large adult frogs ███ ████ ██ ████ ██ ███ ████ ████ █████ █████ █████ ████

Correct. We don't know exactly what the range of the large frogs is — like we discussed above, it's possible that the north, or parts of the north, are too arid even for large frogs — but everything in the stimulus leads us to believe that wherever the small frogs can live, the large frogs can also live there, and can also live in regions that are a bit more arid and where the small frogs can't survive. So the idea that large frogs have a bigger range in the peninsula than small frogs is very strongly supported, even if we don't know the exact range.
89%
d

Fewer small adult █████ ████ ██ ███ █████ ████ ██ █████ █████ ██████

Incorrect. While the stimulus leads us to expect that both small frogs and large frogs can live in the south, there's no information about the relative populations of the two types of frogs in that area.
3%
e

Small adult frogs ██ ███ █████ ████ ████ █████████ █████ ████ █████ █████ █████ ██ ███ ██████

Incorrect. The stimulus doesn't give us any reason to think skin permeability of frogs can vary. And the stimulus also lets us infer that no small adult frogs live in the north, so (E) doesn't hold up based on the information in the stimulus.
3%

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