Explanation for Question 52 From the Reading Section on the 2017 April Sat
Looking now at our final question for this passage and for the 2017 2 April sat rating, section number 52, 3 Nicholas can counters Martone proposal about the evolutionary history of red 4 and green algae by suggesting that what? 5 So let's go back to the passage and see if we can know where 6 they differ in terms of their explanations of evolutionary history. 7 So we see here, 8 um, Martin's working hypothesis. 9 And our second last paragraph is that there's an ancestor 10 shared with red algae and green algae more than a billion years ago, 11 and that they descend from one endosymbiotic event. 12 If we look down here at the findings of Nicholas, 13 the Cornell botanist, um, 14 he says that there might have been separate endosymbiotic events. 15 So looking at our answer choices, 16 the choice that best kind of matches up with that contrast is choice C 17 evolutionary lines leading to the two kinds of algae might have diverged before they 18 acquired the ability to photosynthesize. 19 So this is getting a little bit more into the details, 20 but really the essence of this answer choice is that the, 21 um, evolutionary lines kind of diverged. 22 So we see that in kind of his statement about separate 23 endosymbiotic events. Um, 24 so there's kind of a split in their development. 25 They have, um, evolved along different evolutionary lines. 26 Whereas Martin kind of thinks that they, um, 27 evolve together. They share all of these, 28 um, they share this common ancestor. Um, 29 ...