QUESTION TEXT: A recent study examined the daytime and…
QUESTION TYPE: Paradox
PARADOX: Deciduous forest lemurs have more of a winter nocturnal increase than rain forest lemurs do.
In deciduous forests, trees lose their leaves in winter. In rainforests, trees keep their leaves.
ANALYSIS: I’ve called this question “paradox” for consistency, but really there’s no paradox here. There’s just a lot of information – your task is reduce it to the essential bits. I summarized those above.
The right answer should describe a difference between those two forests. Note that in the setup, the only difference is that in winter, the deciduous lemurs won’t have leaves.
- This answer shows a similarity between both populations. So it can’t help explain a difference.
- CORRECT. This might seem irrelevant. But remember that deciduous forests lose their leaves in winter. So a high flying bird will be able to see lemurs more easily during the day in a winter deciduous forest, due to lack of leaf cover.
At night, of course, it’s too dark to use eyesight to see lemurs. So presumably the birds sleep, and lemurs come out at night in winter deciduous forests because it’s the only safe time.
This answer requires a bit of outside knowledge, which you’re allowed to do when everyone would agree with it. “Darkness and leaves reduce visibility” is a warranted assumption.
- Same as A. This provides a similarity between both forests, so it can’t explain a difference.
- The population size doesn’t matter. We judge whether a population is nocturnal based on what the whole population does. A forest with ten lemurs could be more nocturnal than a forest with 10,000, if those ten lemurs stayed up all night.
- You might have picked this because you thought leaves are plants. But this doesn’t explain anything. Obviously, lemurs in deciduous forests don’t starve – they just become nocturnal. Having a plant/insect diet or instead only a plant diet doesn’t tell you anything about whether a species is nocturnal or not.
Need help with LR? → Sign up hereTry the LSAT Hacks Course
Graeme teaches how to break down arguments, quickly