[Video] Q27: As used in line 50, “control” most nearly means

Explanation for Question 27 From the Reading Section on the 2018 April Sat

Hey guys. So question 27 says as used in line 50 control, 2 most nearly means blank. So let's go back to line 50, 3 read it with control and try and figure out what is this actually saying 4 on 50 is here. 5 Now let's read the sentence and fall. Each insect was placed for five minutes 6 and an apparatus that had two chambers, 7 one of which contained a sample of the volatiles and the other and odorless 8 control. So what this is telling us here is one group is a group 9 that's being tested with this specific thing that he drew from the experiment, 10 which has explained earlier on over here, 11 he's saying we got this special chemical from our experiment, 12 or to put the insects in, to test how they react. 13 But in any experiment design, 14 we also need to test how they would react just normally. 15 So that's what this is when he says the control. 16 He's saying there's this little room where there's nothing out of the ordinary where 17 you can see how insects react to is simply, 18 uh, odorless, um, you know, 19 comparative group, uh, comparative odor. 20 So that seems to be how control is being used here. 21 Now, our options are regulating force. 22 Now this control group isn't really regulating. 23 It's not regulating are controlling the other groups, 24 so that's not going to be a, 25 that's not going to be right in what they mean by control the odor. 26 Isn't a regulating force. B says restrictive mechanism. 27 Once again, this odor isn't a restrictive mechanism. 28 It...