"Although bacteria are unicellular."
I earned a 3/6 on BR on this one. I usually go -1 or -2 on entire RC section while BRing, let alone -3 for one passage.
I had issues with number 16 (after looking it over, I understand why/how I got this one wrong). I originally chose the correct answer when I did it cold, which is frustrating. But, I at the very least get what happened.
However, numbers 17 and 20 are really throwing me for a loop.
Number 17's correct AC is E. My BR was C. I can see as to why E would be sufficient for the bacteria to navigate away from the harmful substance. But, the Q-stem asks for what would "increase the likelihood" of it getting away from the area that is concentrated with the bad stuff. I'm having a hard time seeing why B would not be a better means of the bacteria leaving the bad concentration. The passage seems to imply that bacteria moving towards something it wants in a straight line is a viable means of moving, and it seems reasonable to assume that moving in a straight line is better than just tumbling away from the bad concentration, which is what E states. I guess what is really confusing me is that the passage never says anything about harmful concentration and what bacteria does when it encounters it, and that E ultimately requires us to assume that a bacteria's means of leaving the bad stuff is analogous to how it would leave an attractant, such as food and light. Is it fair to assume such a thing?
When I was BRing I was wrestling between these two ACs.
Number 20
Another question where I was battling between two ACs - I BR'd C and the correct AC is B. The two answer choices seem very close when I consider them. Upon review the only thing that I can find that disproves C is that it uses the word "flaws" when there is only one flaw, or one thing wrong with one of the proposed theories; that there is evidence proving it wrong. I feel like there is more to it than just that, though.
Honestly, any extra insight will help. This was one of those passages where, after finishing it, I felt like I knew it pretty well, but realized that was not the case upon taking on the questions.
Admin note: edited title for formatting
