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25 Mar 2020, 01:30
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (01:42) correct
19%
(01:58)
wrong
based on 308
sessions
History
Date
Time
Result
Not Attempted Yet
The painted spider spins webs that are much stickier than the webs spun by the other species of spiders that share the same habitat. Stickler webs are more efficient at trapping insects that fly into them. Spiders prey on insects by trapping them in their webs therefore. It can be concluded that the painted spider is a more successful predator than its competitors.
Which one of the following, if true, most seriously weakens the argument?
(A) Not all of the species of insects living in the painted spider’s habitat are flying insects.
(B) Butterflies and moths which can shed scales are especially unlikely to be trapped by spider webs that are not very sticky.
(C) Although the painted spider’s venom does not kill insects quickly, it paralyzes them almost instantaneously.
(D) Stickier webs reflect more light and so are more visible to insects than are less-sticky webs.
(E) The webs spun by the painted spider are no larger than the webs spun by the other species of spiders in the same habitat.
thenikhilseth
Joined: 04 Aug 2019
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25 Mar 2020, 02:32
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I choose D
(A) Not all of the species of insects living in the painted spider’s habitat are flying insects- Incorrect
Although all the species of insects are not the flying insect, but it is not given that how many species can fly or not. It is possible that only 10 out of 100 species cannot fly. But in either case, we cannot do any comparison between painted spiders and their competitors.
(B) Butterflies and moths which can shed scales are especially unlikely to be trapped by spider webs that are not very sticky- Incorrect
It strengthens the argument.
(C) Although the painted spider’s venom does not kill insects quickly, it paralyzes them almost instantaneously- Incorrect
No comparison is given.
(D) Stickier webs reflect more light and so are more visible to insects than are less-sticky webs.- Correct
This weakens the argument because if stickier webs are more visible to insects, then obviously there will be less chances that these insects will go closer to the webs and hence, cannot get trapped in it.
(E) The webs spun by the painted spider are no larger than the webs spun by the other species of spiders in the same habitat.- Incorrect
No information about the size of web is given in the argument.
(A) Not all of the species of insects living in the painted spider’s habitat are flying insects- Incorrect
Although all the species of insects are not the flying insect, but it is not given that how many species can fly or not. It is possible that only 10 out of 100 species cannot fly. But in either case, we cannot do any comparison between painted spiders and their competitors.
(B) Butterflies and moths which can shed scales are especially unlikely to be trapped by spider webs that are not very sticky- Incorrect
It strengthens the argument.
(C) Although the painted spider’s venom does not kill insects quickly, it paralyzes them almost instantaneously- Incorrect
No comparison is given.
(D) Stickier webs reflect more light and so are more visible to insects than are less-sticky webs.- Correct
This weakens the argument because if stickier webs are more visible to insects, then obviously there will be less chances that these insects will go closer to the webs and hence, cannot get trapped in it.
(E) The webs spun by the painted spider are no larger than the webs spun by the other species of spiders in the same habitat.- Incorrect
No information about the size of web is given in the argument.
25 Mar 2020, 04:34
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Quote:
ARGUMENT
[c] painted spiders are more successful predators because their webs are stickier;
[p] stickier webs catch more insects that fly into them;
[p] stickier webs are more visible than other webs.
WEAKEN
Ans (D) if stickier webs are more visible, then the probability that less insects fly into them is greater!
. Strengthener 
