Akela wrote:
Anthropologist: It was formerly believed that prehistoric Homo sapiens ancestors of contemporary humans interbred with Neanderthals, but DNA testing of a Neanderthal’s remains indicates that this is not the case. The DNA of contemporary humans is significantly different from that of the Neanderthal.
Old Belief - Prehistoric homesapinen ancestors of contemporary humans interbred with Neanderthals.
Contradiction - DNA testing of Neanderthal remains indicates this is NOT the case.
Result - DNA of contemporary humans is SIGNIFICANTLY different from that of N's.
Which one of the following is an assumption required by the anthropologist’s argument?
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(A) At least some Neanderthals lived at the same time and in the same places as prehistoric Homo sapiens ancestors of contemporary humans.
The argument is about the similarity or lack thereof of the DNA, so this is irrelevant. OUT!
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(B) DNA testing of remains is significantly less reliable than DNA testing of samples from living species.
This is a far-fetched assumption that LSAT has made for us, but the argument in no shape or form refers to this idea. OUT!
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(C) The DNA of prehistoric Homo sapiens ancestors of contemporary humans was not significantly more similar to that of Neanderthals than is the DNA of contemporary humans.
If pre-historic homosapien's interbred with neanderthals, then the author would have to assume that the contemporary human's DNA has not evolved at all to showcase similarity. And is further proven as the researcher test the DNA of contemporary humans with neanderthals. This is a good option. KEEP!
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(D) Neanderthals and prehistoric Homo sapiens ancestors of contemporary humans were completely isolated from each other geographically.
Contradicts the old belief i.e. the premise so this is OUT!
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(E) Any similarity in the DNA of two species must be the result of interbreeding.
Let's say this is true, but we did not find any overlap in the DNA. Does that mean they did not interbreed especially when we have not compared the DNA of prehistoric homosapiens with neanderthals. Close, but C is better. This is OUT too!
C is the right answer.
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