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Horses, although descended from a forest-dwelling ancestor, thrive in grasslands. In the last 2 million years, horses have gone through three cycles of population increase followed by a rapid decline in population. The most recent cycle peaked 25,000 years ago during a cold period that preceded a period of warming.
Which one of the following, if true, most helps to explain why the horse population peaked 25,000 years ago and then rapidly declined?
(A) The forest-dwelling ancestor of horses was many times smaller than horses.
(B) The only true wild horse existing today, Przewalski 's horse, inhabits the cold grasslands of Central Asia.
(C) Some modem species that are related to horses, such as zebras, inhabit the warm grasslands of Africa.
(D) During cold periods there are extensive grasslands, but these tend to revert to forest when the climate warms.
(E) Several cycles of a cold period followed by a period of warming have occurred in the last 2 million years.
Source: LSAT PrepTest 88
Which one of the following, if true, most helps to explain why the horse population peaked 25,000 years ago and then rapidly declined?
(A) The forest-dwelling ancestor of horses was many times smaller than horses.
(B) The only true wild horse existing today, Przewalski 's horse, inhabits the cold grasslands of Central Asia.
(C) Some modem species that are related to horses, such as zebras, inhabit the warm grasslands of Africa.
(D) During cold periods there are extensive grasslands, but these tend to revert to forest when the climate warms.
(E) Several cycles of a cold period followed by a period of warming have occurred in the last 2 million years.
Source: LSAT PrepTest 88
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30 Oct 2020, 06:17
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Horses thrive in grasslands. The most recent population cycle peaked 25,000 years ago during a cold period that preceded a period of warming.
the one, which, mostly helps to explain why the horse population peaked 25,000 years ago and then rapidly declined is:
(A) The forest-dwelling ancestor of horses was many times smaller than horses.(Size matters? Not really! Neither any reference is given in argument) (incorrect)
(B) The only true wild horse existing today, Przewalski 's horse, inhabits the cold grasslands of Central Asia. (Are we talking about the specific kind? No! Neither any reference is given in argument) (incorrect)
(C) Some modem species that are related to horses, such as zebras, inhabit the warm grasslands of Africa.(No connection between zebras and horses are given in argument) (Incorrect)
(D) During cold periods there are extensive grasslands, but these tend to revert to forest when the climate warms. (Suits well, might be the growth of grass lands into forest was the cause of horse population decline) (Correct)
(E) Several cycles of a cold period followed by a period of warming have occurred in the last 2 million years.(No specific time period is given other than the 25,000 years ago)(Incorrect)
Answer is D
the one, which, mostly helps to explain why the horse population peaked 25,000 years ago and then rapidly declined is:
(A) The forest-dwelling ancestor of horses was many times smaller than horses.(Size matters? Not really! Neither any reference is given in argument) (incorrect)
(B) The only true wild horse existing today, Przewalski 's horse, inhabits the cold grasslands of Central Asia. (Are we talking about the specific kind? No! Neither any reference is given in argument) (incorrect)
(C) Some modem species that are related to horses, such as zebras, inhabit the warm grasslands of Africa.(No connection between zebras and horses are given in argument) (Incorrect)
(D) During cold periods there are extensive grasslands, but these tend to revert to forest when the climate warms. (Suits well, might be the growth of grass lands into forest was the cause of horse population decline) (Correct)
(E) Several cycles of a cold period followed by a period of warming have occurred in the last 2 million years.(No specific time period is given other than the 25,000 years ago)(Incorrect)
Answer is D
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