Explanation for Question 47 From the Reading Section on the 2017 May Sat
Question 47 asks in passage to the main purpose of the information in lines 2 89 through 91 is to do what? 3 So let's look back at the information provided in these lines, 4 and then we can go through each of the answer choices. 5 So what they're saying here is she also found that the invasive plants lost 6 less water each day through the pores in their leaves than the native plants 7 did regardless of the growing season. So just to kind of summarize this or 8 put it in different words, the invasive plants are retaining more water than the 9 native species. So if you look back at the answer choices here, 10 we can talk about each of these answer choice a says to provide background 11 information about leaf structure and desert plants, 12 answer choice a is going to be incorrect. 13 It's too general here. And in this case, 14 they're not talking about these as desert plants versus like invasive plants is 15 how they're classified. 16 Yes, they might be in the desert. And that might be mentioned in passage 17 one, but that's not really the context that is appropriate for 18 describing these studies. If you look at answer choice B, 19 it says to refute the claim made by the author of passage, 20 one about the resource hypothesis. So if we look back in to 21 passage, one about what the resource hypothesis actually is, 22 it says the resource hypothesis suggests that plant invasion is caused by availability 23 of resources, such as light water and soil nutrients. 24 So in this cas...