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07 Jul 2020, 09:47
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VeritasKarishma
Dear AnthonyRitz IanStewart GMATGuruNY AjiteshArun MartyTargetTestPrep DmitryFarber GMATNinja ,
I wonder whether YES answer to choice B. would mean that the number of ticks acquiring the bacterium would stay EXACTLY THE SAME (not decline)?
07 Jul 2020, 11:18
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varotkorn
I mean, maybe? Probably? But possibly not? The number of infected ticks could also increase a bit, if somehow the larvae get transmitted from one food source to another.
But the main point here is that it's a strengthen/weaken, not a prove true/false.
If the food is the limiting factor, then "more food = more ticks" but there's no particular reason to expect fewer infected ticks as long as the tick population expands to fill the available food supply -- as many mice as before would presumably be carriers. But if food is not the limiting factor, then diversifying the food choices will presumably lead to some larvae feeding on uninfected food sources instead of white footed mice, so you'd have fewer infected ticks. That's not certainty, but it's plenty good enough to act as the strengthener/weakener that this "useful to evaluate" question needs.
24 Jul 2020, 06:37
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jjhko
This is tricky question lads, hope my explanation will help you, at least a little bit.
A - this answer choice seems to be attempting, however, it doesn't help to establish any data from the conclusion, like, if the other species are found in the area only inhabited by white-footed mice - so what? will it really increase the help to decrease the number of infected ticks? who knows? - OUT
B- so B says, how limited the number of other species, if they are not that many that tick has no other choice, but to prey on white-footed mice - looks attempting, let's keep that.
C- it literally says, if we increase the number of other species that prey on white-footed mice, will it influence the number infected ticks, and will lead to the decrease on infections - well looks interesting as well, let's go conservative way, and keep it as well
D- confusing as hell, speaking about larvae ticks and adult ticks, did anybody ask anything about ticks age, sounds very weird - OUT
E- it introduces another premise, trying to say that that might be another species that transmit infectious bacteria to the ticks, rather than mice - it might sound right, but it not, we not talking about other species, we being asked directly about white-footed mice and how the influence deer ticks - OUT of scope
Between B and C, honestly, at first, I personally picked up C, but B is the correct answer. Because if you think about it - if there are other species that prey on white-footed mice, like deer ticks, it means that, you will have less prey for ticks than other animals will become infected, and we start a new COVID-19 like pandemic... joking, but by increasing the number of other species that prey on white-footed mice, we might decrease the population of deer ticks, but it's not what we want to do, we want to decrease the number of Lyme transmitting ticks, thus decrease the number of white-footed and increase the number of other species that ticks prey on.
Hope it helps lads.
