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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
Can you please explain question 2?

Where is it said that human brain changes were facilitated by changes in digestive system?

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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
Can anyone explain question no 3 and 4?
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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
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Third is related to the main idea of the passage

Based on their observations of our ancestral hunter-gatherers’ modern counterparts, the biological anthropologists concluded that the depiction of hunter-gatherer diets as meat-centric fails to reflect both the variety and variability of such diets.


To understand the extent of dietary variability, biological anthropologists first evaluated the percentage of annual calories derived from meat across several modern hunter-gatherer populations.


This is an in-depth explanation of a different view of the anatomy of the humans at the time. The diet was not so restricted and the evolution had a slight different path from what we thought

see here https://gre.myprepclub.com/forum/how-to-sc ... 23624.html for download PDFs about the main idea and how to tackle it
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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
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The second

hunting and eating habits of the few remaining hunter-gatherer peoples calls into question this continued reliance on an increase in meat intake as the sole explanation for human brain size.

The brain's seize was the result of the evolution thanks to the diet and if the diet was variegated and different from only eating meat, then the digestive apparatus was also different from what we thought

D is the answer
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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
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This is a questio9n that even though is tough you can address without reading the passage and read very careful the stem


Which of the following, if true, would most directly contradict

the mean weakens

the assumption


that omnivorous diets are more broadly reflective of early hominid practices than are carnivorous diets?

the diet is broader than the carnivorous diet??

what can tell us that early hominid had a more variegated diet ? eating some other type of food


A) During the period when hominids were diverging from other primates, the Arctic climate covered more of the earth than it does today.

completely out of scope

B) Few of the fossil teeth recovered to date show wear patterns consistent with regular consumption of high-calorie plant substances.

correct. no doubt on it

C) The game animals available to early hominids were much larger than the prey available to today’s hunter-gatherer populations.

the game animals...blah blah ...a comparison tell us nothing about the diet

D) Many modern humans avoid meat because they lack an enzyme that allows the body to convert meat proteins efficiently into nutrients.

modern humans and what they eat tell us nothing

E) Existing hunter-gatherer people have a more expansive range than did early hominids.

the range .....is out of scope. tell us nothing
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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
Carcass , for question no 2 why is the answer not A ? Can you please explain ?
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Re: Paleoanthropologists have long believed that the growth of the human [#permalink]
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The only mention we do have in the passage is the following sentence at the beginning of the passage itself

the consumption of high-calorie meat allowed human ancestors to survive with smaller stomachs, freeing energy for the development of larger brains.

But there is no comparison between brain and stomach their size. No way.

From the passage we clearly understand that our ancestors did not eat only meat but they were omnivores like us nowadays

And we can conclude that because they has a variegated diet they should have a digestive system that is adapted to the evolution
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