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Antarctic seals dive to great depths and stay submerged for hours.

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Antarctic seals dive to great depths and stay submerged for hours. [#permalink]

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New post 09 Mar 2017, 03:06
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Antarctic seals dive to great depths and stay submerged for hours. They do not rely solely on oxygen held in their lungs, but also store extra oxygen in their blood. Indeed, some researchers hypothesize that for long dives these seals also store oxygenated blood in their spleens.

Each of the following, if true, provides some support for the researchers' hypothesis EXCEPT:

A) Horses are known to store oxygenated blood in their spleens for use during exertion.

B) Many species of seal can store oxygen directly in their muscle tissue.

C) The oxygen contained in the seals' lungs and bloodstream alone would be inadequate to support the seals during their dives.

D) The spleen is much larger in the Antarctic seal than in aquatic mammals that do not make long dives.

E) The spleens of Antarctic seals contain greater concentrations of blood vessels than are contained in most of their other organs.
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Re: Antarctic seals dive to great depths and stay submerged for hours. [#permalink]

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New post 09 Mar 2017, 05:57
Question: Strengthen Except

Researcher's hypothesis: Seals store oxygenated blood in their spleen for long dives.

A) Horses are known to store oxygenated blood in their spleens for use during exertion. - Incorrect. Supports the hypothesis that its possible to store oxygenated blood in the spleen.

B) Many species of seal can store oxygen directly in their muscle tissue. - Correct. If they can store oxygen in their muscle tissue why do they need spleen? Weakens the researcher's hypothesis.

C) The oxygen contained in the seals' lungs and bloodstream alone would be inadequate to support the seals during their dives. - Incorrect. Spleen is required to store oxygen.

D) The spleen is much larger in the Antarctic seal than in aquatic mammals that do not make long dives. - Incorrect. Supports. May be its larger to store oxygenated blood.

E) The spleens of Antarctic seals contain greater concentrations of blood vessels than are contained in most of their other organs. - Incorrect. Supports.

Answer: B
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Re: Antarctic seals dive to great depths and stay submerged for hours. [#permalink]

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New post 09 Mar 2017, 22:44
vikasp99 wrote:
Antarctic seals dive to great depths and stay submerged for hours. They do not rely solely on oxygen held in their lungs, but also store extra oxygen in their blood. Indeed, some researchers hypothesize that for long dives these seals also store oxygenated blood in their spleens.


Each of the following, if true, provides some support for the researchers' hypothesis EXCEPT:

A) Horses are known to store oxygenated blood in their spleens for use during exertion. Supports the contention that if horses can store there is a possibility that seals also store

B) Many species of seal can store oxygen directly in their muscle tissue. The argument talks about Antarctic seals , while this option states many seals. Out of Scope.

C) The oxygen contained in the seals' lungs and bloodstream alone would be inadequate to support the seals during their dives. Provides a reason for the need to store extra oxygen

D) The spleen is much larger in the Antarctic seal than in aquatic mammals that do not make long dives. larger spleen could be for a reason perhaps to store extra oxygen

E) The spleens of Antarctic seals contain greater concentrations of blood vessels than are contained in most of their other organs.proof that more oxygen can be stored
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Re: Antarctic seals dive to great depths and stay submerged for hours. [#permalink]

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New post 15 Mar 2017, 10:30
Antarctic seals dive to great depths and stay submerged for hours. They do not rely solely on oxygen held in their lungs, but also store extra oxygen in their blood. Indeed, some researchers hypothesize that for long dives these seals also store oxygenated blood in their spleens.

Each of the following, if true, provides some support for the researchers' hypothesis EXCEPT:

A) Horses are known to store oxygenated blood in their spleens for use during exertion. Provides support by analogy

B) Many species of seal can store oxygen directly in their muscle tissue. Correct choice for except question.

C) The oxygen contained in the seals' lungs and bloodstream alone would be inadequate to support the seals during their dives. provides the cause of such thing. thus providing support

D) The spleen is much larger in the Antarctic seal than in aquatic mammals that do not make long dives. clarifies that the spleen is inlarged only in antarctic seal ,which makes the long dives and not other quatic mammals, thus somewhat supporting.

E) The spleens of Antarctic seals contain greater concentrations of blood vessels than are contained in most of their other organs.
supports by giving reason to why is it stored in spleen.
Re: Antarctic seals dive to great depths and stay submerged for hours.   [#permalink] 15 Mar 2017, 10:30
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Antarctic seals dive to great depths and stay submerged for hours.

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