ETS Official Guide Practice Test Section 4 Q 20

GRE Verbal Problem Solving
1

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I cannot follow the logic here.

  • According to the second sentence, the fact that ‘the shorter the parasite is in the human the more harmful it is.’ is NOT always true.
  • I thought the first sentence would say about dangerous species (which I got right B for (i)). And since they have entered into human body recently, they don’t have enough time (E for (ii)) to be harmful (blank for (iii).

I cannnot piece these two sentences together with logic and information. Please help me understand. Thank you!

2

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This question forces us to do it in certain order. The key idea is at the last sentence : "Yet there is no reliable …species "

so less time = harmful
more time = less harmful

Blank(i) says malarial parasite more recently entered thus, blank(i) = harmful .
And if they’re more recently entered then they have less time [blank(ii)] to evolve toward being less harmful[blank(iii)]

Ans: B , E,H