Explanation for Question 51 From the Reading Section on the 2017 May Sat
Question 51 asks which claim from passage. 2 One about an area colonized by an invasive species was directly tested in the 3 experiment described in the second paragraph of passage too. 4 So what we're going to do is look back at this paragraph, 5 describing the experiment here and to determine what is being tested in that 6 experiment. We have to identify the variables that are being tested. 7 And so that will give us kind of an idea of what the objective 8 of this experiment is, what it's trying to determine. 9 So if we look back at the paragraph that they're referencing in passage two, 10 it's kind of difficult to see all at once, but underline there, 11 you can read the whole thing on your own, but underline, there is the 12 variable that they're testing. It says the experimental plots were sprayed weekly with insecticides 13 to eliminate insects that feed on plants while control plots were left. 14 Unsprayed. So in this case, the variable that they're testing here is the amount 15 of insects on the plants, right? If you have insecticides, 16 you're going to have less insects. If you have no insecticides, 17 you're going to have more insects. So let's look at the answer choices here 18 and see which one outlines the idea of testing the number 19 of insects on the plant. So if we read through, 20 it says native plants are susceptible to chemicals produced by an invasive species answer, 21 choice a is going to be incorrect because that would suggest that chemicals here 22 w...