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Zoologist: In the Lake Champlain area, as the North American snowshoe

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Zoologist: In the Lake Champlain area, as the North American snowshoe  [#permalink]

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New post 30 May 2018, 09:00
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Difficulty:

  55% (hard)

Question Stats:

66% (02:36) correct 34% (02:51) wrong based on 137 sessions

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Zoologist: In the Lake Champlain area, as the North American snowshoe hare population grows, so do the populations of its predators. As predator numbers increase, the hares seek food in more heavily forested areas, which contain less food, and so the hare population declines. Predator populations thus decline, the hare population starts to increase, and the cycle begins again. Yet these facts alone cannot explain why populations of snowshoe hares everywhere behave simultaneously in this cyclical way. Since the hare population cycle is well correlated with the regular cycle of sunspot activity, that activity is probably a causal factor as well.

Each of the following, if true, supports the zoologist's reasoning EXCEPT:


(A) Reproduction in predator populations increases when sunspot activity indirectly affects hormonal processes associated with reproduction.

(B) Local weather patterns that can affect species' population changes can occur both in the presence of sunspot activity and in its absence.

(C) Brighter light during sunspot activity subtly but significantly improves the ability of predators to detect and capture hares.

(D) The variation from cycle to cycle in the magnitude of the highs and lows in snowshoe hare populations is highly correlated with variations from cycle to cycle in the intensity of highs and lows in sunspot activity.

(E) Sunspot activity is correlated with increases and decreases in the nutritional value of vegetation eaten by the hares.

Source: LSAT

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Re: Zoologist: In the Lake Champlain area, as the North American snowshoe  [#permalink]

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New post 30 May 2018, 13:20
"Local weather patterns that can affect species' population changes can occur both in the presence of sunspot activity and in its absence" clearly points out that sunspots have no effect on weather change. Thus, it will not affect the population of hare.
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Re: Zoologist: In the Lake Champlain area, as the North American snowshoe  [#permalink]

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New post 17 Jul 2018, 21:35
Where is anything related to Option E mentioned?
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Re: Zoologist: In the Lake Champlain area, as the North American snowshoe  [#permalink]

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New post 17 Jul 2018, 22:22
prashant6923 wrote:
Where is anything related to Option E mentioned?

Better the nutrition- Better life for hares. Nutrition value of hare's food is related to Sunspot activity. So I think Option E builds a correlation between hares population and Sunspot activity.


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Re: Zoologist: In the Lake Champlain area, as the North American snowshoe &nbs [#permalink] 17 Jul 2018, 22:22
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Zoologist: In the Lake Champlain area, as the North American snowshoe

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