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ajaygaur319
Joined: 05 May 2019
Last visit: 01 Jan 2021
Posts: 125
Given Kudos: 143
Location: India
Schools: NYU Tech MBA "21
02 May 2020, 05:13
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
67% (01:52) correct
33%
(02:00)
wrong
based on 1134
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Evolution is a phenomenon where different species change their anatomical, chemical or behavioral characteristics in response to the changes in their habitat. Since multiple species share a habitat, scientists expect their rates of evolution to be comparable. However, over the past hundred thousand years, homo sapiens evolved at a much higher rate than did chimpanzees living in the same habitat.
Which of the following resolves the paradox presented in the passage?
(A) Some habitats may change at rates faster than others causing species in it to evolve faster.
(B) Climatic changes over the last hundred thousand years have had a much greater positive evolutionary impact on food sources of Homo Sapiens than on that of other species sharing the habitat.
(C) Some species evolve their brains faster than others as they get into a more upright posture.
(D) There is a distinct evidence of an epidemic hundred thousand years ago that severely impacted the Chimpanzees.
(E) Singular events, although have an impact on the survival or extinction of a species, have little bearing on their long-term evolution rates.
Which of the following resolves the paradox presented in the passage?
(A) Some habitats may change at rates faster than others causing species in it to evolve faster.
(B) Climatic changes over the last hundred thousand years have had a much greater positive evolutionary impact on food sources of Homo Sapiens than on that of other species sharing the habitat.
(C) Some species evolve their brains faster than others as they get into a more upright posture.
(D) There is a distinct evidence of an epidemic hundred thousand years ago that severely impacted the Chimpanzees.
(E) Singular events, although have an impact on the survival or extinction of a species, have little bearing on their long-term evolution rates.
03 May 2020, 22:46
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At first, I was confused between B and D, but after reading "E" I realized answer option B is a better choice.
Option "E", kind of, explains why D can not be the answer.
Option "E", kind of, explains why D can not be the answer.
08 May 2020, 00:23
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abhinav261289
Hi Abhinav
Option (C) states: Some species evolve their brains faster than others as they get into a more upright posture.
Therefore, while it is true that homo sapiens are more upright than chimpanzees, we do not know if this necessarily led to their brains evolving faster. Additionally, the paradox is about the faster evolution of homo sapiens compared to chimpanzees over the last hundred thousand years. We do not know from the stimulus whether the homo sapiens grew more erect over this period or they they were already erect before this period. This is not information that can be logically assumed. Hence (C) does not help to resolve the paradox.
Option (B) confirms the positive impact on the food sources of homo sapiens and it is a logical extrapolation to extend the same positive impact to the evolution of the consumers of such food. This is less of a leap than assuming that homo sapiens and chimpanzees were both hunched at the beginning of the hundred thousand year period under consideration. Hence, between the two, (B) better resolves the paradox.
Hope this helps.
