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# The disappearance of Steller's sea cow from the Bering and C

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The disappearance of Steller's sea cow from the Bering and C [#permalink]  27 Feb 2017, 03:04
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79% (02:35) correct 20% (03:44) wrong based on 49 sessions

The disappearance of Steller's sea cow from the Bering and Copper islands by 1768 has long been blamed on intensive hunting. But its disappearance took only 28 years from the time Steller first described the species, a remarkably short time for hunting alone to depopulate the islands, especially given the large populations initially reported. However, by 1750, hunters had also targeted nearby sea otter populations. Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase. Sea cows were totally dependent on kelp for food, and within a decade of the onset of otter hunting Steller noted that the islands' sea cows appeared malnourished.
Which of the following can be inferred from the passage about kelp forests in the Bering and Copper islands between 1750 and 1768 ?

A) They were reduced significantly.
B) They disappeared entirely from the region.
C) They were the primary food source for sea otters.
D) They were harvested in record numbers by humans.
E) They increased pressure on sea urchin populations.

[Reveal] Spoiler: OA
A

According to the passage, it is likely that during the mid-1700s, sea urchin populations near the Bering and Copper islands

A) were diminished by sea cow predation
B) experienced substantial increases
C) migrated to waters with more plentiful food supplies
D) were reduced by the pressures of hunting
E) appeared to be malnourished

[Reveal] Spoiler: OA
B

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Re: The disappearance of Steller's sea cow from the Bering and C [#permalink]  08 Mar 2017, 03:57
Expert's post
Explanation

1)

here the OA is A. Notice how E is tricky if you do not read very carefully. E is the other way around. The reverse.

2)
Quote:
But its disappearance took only 28 years from the time Steller first described the species, a remarkably short time for hunting alone to depopulate the islands, especially given the large populations initially reported.

From the entire sentence and the red part, you clearly might infer that the population experienced substantial increases
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Re: The disappearance of Steller's sea cow from the Bering and C [#permalink]  13 Oct 2018, 05:28
1.A
2.B
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Re: The disappearance of Steller's sea cow from the Bering and C [#permalink]  17 Apr 2019, 09:53
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Which of the following can be inferred from the passage about kelp forests in the Bering and Copper islands between 1750 and 1768 ?

A) They were reduced significantly.
B) They disappeared entirely from the region.
C) They were the primary food source for sea otters.
D) They were harvested in record numbers by humans.
E) They increased pressure on sea urchin populations.
''Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase'' from this sentence we can infer that klep forest was reduce due to increase in urchins but not disappeared entirely doesn't supported by the passage.

According to the passage, it is likely that during the mid-1700s, sea urchin populations near the Bering and Copper islands

A) were diminished by sea cow predation
B) experienced substantial increases
C) migrated to waters with more plentiful food supplies
D) were reduced by the pressures of hunting
E) appeared to be malnourished
hunters had also targeted nearby sea otter populations. Fewer otters means increase in urchin population. so clearly B is the answer.
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Re: The disappearance of Steller's sea cow from the Bering and C [#permalink]  06 May 2019, 04:13
Smart passage
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Re: The disappearance of Steller's sea cow from the Bering and C [#permalink]  09 Jul 2019, 17:06
1. You can infer this from the end of the passage, it is said that sea cows were total dependent on kelp for food and they looked malnourished. Which means that kelp forests have been reduced significantly.

2. It is mentioned in the last to before line of the paragraph. It is mentioned about urchin’s grazing pressure on the kelp forests to increase and hence the population of sea urchins.
Re: The disappearance of Steller's sea cow from the Bering and C   [#permalink] 09 Jul 2019, 17:06
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