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Sifakas are among a short list of primates other than humans known to

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Sifakas are among a short list of primates other than humans known to [#permalink]

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New post 10 Jan 2018, 10:40
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Sifakas are among a short list of primates other than humans known to display a preference for using one hand rather than the other. Significantly more Sifakas are left-handed than are right-handed. Since infant Sifakas engage in much imitative behavior, researchers hypothesize that it is by imitation that infant Sifakas learn which hand to use, so that offspring reared by left-handed parents generally share their parents' handedness.

Which one of the following, if true, most supports the researchers' hypothesis?

A) A study conducted on adult Sifakas revealed that many were right-handed

B) Right-handed Sifakas virtually all have at least one sibling who is left-handed

C) According to the study, 33 percent of Sifakas are ambidextrous, showing equal facility using either their left hand or their right hand

D) Ninety percent of humans are right-handed, but those who are left-handed are likely to have at least one left-handed parent

E) Sifakas raised in captivity with right-handed adult Sifakas to whom they are not related are more likely to be right-handed than left-handed
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Re: Sifakas are among a short list of primates other than humans known to [#permalink]

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New post 10 Jan 2018, 13:33
LakerFan24 wrote:
Sifakas are among a short list of primates other than humans known to display a preference for using one hand rather than the other. Significantly more Sifakas are left-handed than are right-handed. Since infant Sifakas engage in much imitative behavior, researchers hypothesize that it is by imitation that infant Sifakas learn which hand to use, so that offspring reared by left-handed parents generally share their parents' handedness.

Which one of the following, if true, most supports the researchers' hypothesis?

A) A study conducted on adult Sifakas revealed that many were right-handed

B) Right-handed Sifakas virtually all have at least one sibling who is left-handed

C) According to the study, 33 percent of Sifakas are ambidextrous, showing equal facility using either their left hand or their right hand

D) Ninety percent of humans are right-handed, but those who are left-handed are likely to have at least one left-handed parent

E) Sifakas raised in captivity with right-handed adult Sifakas to whom they are not related are more likely to be right-handed than left-handed


Stem - Sifakas are left handed because they imitate elders. (Implied assumption - There are no genetic or any other reason for the same)

A - Irrelevant. No hypothesis available related to study subjects.
B - As per statement - there is a mix of right and left-handed Sifakas. It weakens the given hypothesis.
C - Very much similar to Option B
D - Close but no reason is given for children and parents being left handed. It may be because of genetics or any other reason.
E - If we keep Sifakas with right-handed adult Sifakas, they are more likely to be right-handed.
We are just keeping them together so no other reason than Imitation more them to be right-handed
Correct answer supporting Stem.
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Re: Sifakas are among a short list of primates other than humans known to [#permalink]

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New post 16 Jan 2018, 01:58
Sifakas are among a short list of primates other than humans known to display a preference for using one hand rather than the other. Significantly more Sifakas are left-handed than are right-handed. Since infant Sifakas engage in much imitative behavior, researchers hypothesize that it is by imitation that infant Sifakas learn which hand to use, so that offspring reared by left-handed parents generally share their parents' handedness.

Which one of the following, if true, most supports the researchers' hypothesis?

A) A study conducted on adult Sifakas revealed that many were right-handed -The argument doesn't say that ALL the Sifacas are left handed. This is just a fact stated in the argument.

B) Right-handed Sifakas virtually all have at least one sibling who is left-handed -Weakener

C) According to the study, 33 percent of Sifakas are ambidextrous, showing equal facility using either their left hand or their right hand -This would, if anything, weaken the argument.

D) Ninety percent of humans are right-handed, but those who are left-handed are likely to have at least one left-handed parent -Argument is abut Sifakas and not about humans. Out of scope.

E) Sifakas raised in captivity with right-handed adult Sifakas to whom they are not related are more likely to be right-handed than left-handed -Correct. Since it is in line with the hypothesis that young Sifakas learn by immitation.
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Re: Sifakas are among a short list of primates other than humans known to   [#permalink] 16 Jan 2018, 01:58
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Sifakas are among a short list of primates other than humans known to

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