PT153 S4 P1 Q7 ExplanationForest Preservation

Answer choices, explained

1. A

   Out of Scope: diseases affecting plants23% picked this

   Some diseases that affect plants also affect

   The passage never mentions any diseases that affect plants. In the third paragraph, it says that we suspect that some plants within tropical rain forests may have unique "disease-fighting" properties. But that's saying that a plant will have some chemical in it (possibly something it uses as a natural pesticide to discourage insects) that the drug-making industry finds useful (a special amino acid that neutralizes typhoid fever).

   23%
2. B

   Correct42% picked this

   Deforestation can have negative effects on

   Why this is right

   This is supported in the first paragraph's second sentence: forests provide recreations, reduce flooding, and prevent soil erosion that clogs rivers with silt. If having forests leads to rivers being less clogged with silt, then deforestation could lead to rivers being more clogged with silt. If a river is clogged with silt, then water-based transportation will have a harder time traveling down that river. Is this one of the biggest, most obnoxious reaches a correct answer has performed? Yes, I'd say this probably ranks top 20. It's a good reminder about how hard and obscure questions can be that have question stems like - what can be inferred - what does the passage suggest - which is most supported Students often assume/hope that these questions are still testing big ideas. Once in a while they are, but at least as frequently the correct answer is just a derivable truth from some random little detail in the passage. We'd have to ask ourselves questions in order to find the appropriate support, like, "Did they tell us anything about deforestation? Did we ever talk about water-based transportation?" In many cases, having that curious, agnostic mindset is good enough to help us go research possible supporting text, at which point we might see the little detail that allows us to support the correct answer. But in this case, "water-based transportation" feels so out of scope, it takes a heroic effort to figure out where in the passage to even look for this randomness.

   Skill tested: Inference · how this choice captures the passage's function is the move to repeat next time.

   42%
3. C

   Contradicted3% picked this

   There are more commercial plantations than any other type

   The final paragraph is telling us that commercial plantations are a tiny minority of forests. The final sentence of the passage is saying that plantations make up just 3 percent of the world's forest area.

   3%
4. D

   Out of Scope: endangered22% picked this

   There are more species of plants and animals internationally recognized as endangered in tropical rain forest

   This answer is appealing to our common sense, since tropical rain forests have such rich, voluminous density of species that one would assume that they have more species in any category than other types of forest. But there's no support for this in the passage. We certainly don't talk about internationally recognized endangered species.

   22%
5. E

   Too Strong: rarely10% picked this

   Commercial plantations produce goods that are rarely used in the countries where the

   Commercial plantations are discussed in the final paragraph, and nothing in that paragraph ever mentions where the goods are sold. If we say that they are rarely sold in the country where they're produced, then we're claiming that "at least 51% of those goods are exported to other countries". There's no information resembling that at all.

   10%