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06 Jul 2020, 12:27
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
41% (01:50) correct
59%
(02:00)
wrong
based on 456
sessions
History
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Not Attempted Yet
Zoologist: Horseflies are attracted to horizontally polarized light, which reflects off large, dark animals that they bite. This may explain why zebras evolved vertical stripes—the stripes cancel the horizontal polarization of light and thus make zebras less attractive to horseflies.
In order to assess the plausibility of the zoologist's hypothesis, it would be most helpful to know whether
A. any insects other than horseflies are attracted to horizontally polarized light.
B. the vertical stripes on zebras make it easier for any insects other than horseflies to see them.
C. animals that horseflies commonly bite have evolved other means of reducing the impact an frequency of those bites.
D. any biting insects other than horseflies are strongly attracted to zebras.
E. zebras' vertical stripes provide camouflage protection against certain large predators potentially very dangerous to zebras.
In order to assess the plausibility of the zoologist's hypothesis, it would be most helpful to know whether
A. any insects other than horseflies are attracted to horizontally polarized light.
B. the vertical stripes on zebras make it easier for any insects other than horseflies to see them.
C. animals that horseflies commonly bite have evolved other means of reducing the impact an frequency of those bites.
D. any biting insects other than horseflies are strongly attracted to zebras.
E. zebras' vertical stripes provide camouflage protection against certain large predators potentially very dangerous to zebras.
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07 Jul 2020, 07:01
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From the passage, We can conclude that the vertical stripe on Zebras are of some crucial advantages to them, otherwise their stripes pattern wouldn't have been the main highlight. We just have to see which of the option is working in the favour of zebra patterns.
A. any insects other than horseflies are attracted to horizontally polarized light. (Not in reference to the vertical pattern of zebras) (INCORRECT)
B. the vertical stripes on zebras make it easier for any insects other than horseflies to see them. (It is possible that other insects may harm the zebras, if they are highlighted to them, Not working in favour of Zebras) (INCORRECT)
C. animals that horseflies commonly bite have evolved other means of reducing the impact an frequency of those bites. (No useful information in regard whether the vertical pattern of zebras are of advantageous or not) (INCORRECT)
D. any biting insects other than horseflies are strongly attracted to zebras. (this is weakening the passage argument, as the insects can harm zebras if they are attracted to them) (Out of Scope)
E. zebras' vertical stripes provide camouflage protection against certain large predators potentially very dangerous to zebras.( This is strengthening the argument that the stripe pattern of zebras help them by providing a camouflage protection against certain large predators which can be dangerous for them) (CORRECT)
Answer is E
A. any insects other than horseflies are attracted to horizontally polarized light. (Not in reference to the vertical pattern of zebras) (INCORRECT)
B. the vertical stripes on zebras make it easier for any insects other than horseflies to see them. (It is possible that other insects may harm the zebras, if they are highlighted to them, Not working in favour of Zebras) (INCORRECT)
C. animals that horseflies commonly bite have evolved other means of reducing the impact an frequency of those bites. (No useful information in regard whether the vertical pattern of zebras are of advantageous or not) (INCORRECT)
D. any biting insects other than horseflies are strongly attracted to zebras. (this is weakening the passage argument, as the insects can harm zebras if they are attracted to them) (Out of Scope)
E. zebras' vertical stripes provide camouflage protection against certain large predators potentially very dangerous to zebras.( This is strengthening the argument that the stripe pattern of zebras help them by providing a camouflage protection against certain large predators which can be dangerous for them) (CORRECT)
Answer is E
07 Jul 2020, 12:47
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Frank28
Time Taken: 1 min 55 seconds | Question Type: Evaluate the Argument
1. Translating the technical aspect of polarization to simple language, consider that when light falls on a surface with a single color it becomes visible to horseflies, whereas when stripes come into picture the light reaches in very low quantity to houseflies.
2. This reduction in the amount of light makes Zebras less attractive to horseflies. So the hypothesis is that the stripes keep the horseflies away from the Zebras
3. The correct answer will be two-way a. Yes, the stripes make the Zebras less attractive to horseflies and b. No, the stripes do not make the Zebras less attractive to horseflies
First, the correct option:
E. zebras' vertical stripes provide camouflage protection against certain large predators potentially very dangerous to zebras
This is in line with our pre-thinking
a. Yes, the stripes provide protection against large predators - In that case the hypothesis falls apart as the stripes are meant for keep horseflies away from Zebras
b. No, the stripes do not provide protection against large predators - In that case the hypothesis does apply
A. any insects other than horseflies are attracted to horizontally polarized light
We are concerned about the protection of Zebras from horseflies and are not concerned about other insects
B. the vertical stripes on zebras make it easier for any insects other than horseflies to see them
Again, same as explanation for A
C. animals that horseflies commonly bite have evolved other means of reducing the impact an frequency of those bites
We are concerned with the evolution of Zebra stripes and the protection they provide from horseflies. The other animals that horseflies bite is not relevant to the argument at hand
D. any biting insects other than horseflies are strongly attracted to zebras
Again, same as explanation for A
Ans. E
