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Spiny lobsters, found in tropical areas worldwide often leave their de

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Spiny lobsters, found in tropical areas worldwide often leave their de [#permalink]

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New post 24 Mar 2018, 02:33
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Spiny lobsters, found in tropical areas worldwide often leave their dens at night too giraffe over large areas but have liye trouble returning to the same dens, even in complete darkness. Migratory birds and sea turtles are fanned for their ability to navigate by reading small variations in the Earth's magnetic field. Researchers say that the spiny lobster, shares this she built in navigational sense.

Which of the following, if true, would most strongly support the conclusions drawn by the researchers ?


A. Most animals in tropical areas have a built in sense of navigation similar to that possessed by the spiny lobsters.

B. Spiny lobsters are found in almost all warm seas - habitats in which migratory birds and sea turtles are also found.

C. Spiny lobsters, like migratory birds and sea turtles do have small sensors for sensing magnetic field variations.

D. In a laboratory simulation of the lobsters' natural environment, when magnetic fields were changed, lobsters changed their direction of movement.

E. Spiny lobster sense the magnetic field using their hind legs while birds and sea turtles have the sensors located in wings and feet respectively.

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Spiny lobsters, found in tropical areas worldwide often leave their de [#permalink]

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New post 24 Mar 2018, 04:12
SonalSinha803 wrote:
Spiny lobsters, found in tropical areas worldwide often leave their dens at night too giraffe over large areas but have liye trouble returning to the same dens, even in complete darkness. Migratory birds and sea turtles are fanned for their ability to navigate by reading small variations in the Earth's magnetic field. Researchers say that the spiny lobster, shares this she built in navigational sense.

Which of the following, if true, would most strongly support the conclusions drawn by the researchers ?


A. Most animals in tropical areas have a built in sense of navigation similar to that possessed by the spiny lobsters.

B. Spiny lobsters are found in almost all warm seas - habitats in which migratory birds and sea turtles are also found.

C. Spiny lobsters, like migratory birds and sea turtles do have small sensors for sensing magnetic field variations.

D. In a laboratory simulation of the lobsters' natural environment, when magnetic fields were changed, lobsters changed their direction of movement.

E. Spiny lobster sense the magnetic field using their hind legs while birds and sea turtles have the sensors located in wings and feet respectively.


I believe option D is the right answer as the main assumption is spiny lobsters navigate with the help of built in magnetic sensors.
A, B and E have data that is irrelevant, but C and D seem interesting. C talks about similar sensors but that does not state that those sensors are used for navigation, but D states when there is change in magnetic field the lobsters change direction.
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Re: Spiny lobsters, found in tropical areas worldwide often leave their de [#permalink]

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New post 24 Mar 2018, 20:32
SonalSinha803 wrote:
Spiny lobsters, found in tropical areas worldwide often leave their dens at night too giraffe over large areas but have liye trouble returning to the same dens, even in complete darkness. Migratory birds and sea turtles are fanned for their ability to navigate by reading small variations in the Earth's magnetic field. Researchers say that the spiny lobster, shares this she built in navigational sense.

Which of the following, if true, would most strongly support the conclusions drawn by the researchers ?


A. Most animals in tropical areas have a built in sense of navigation similar to that possessed by the spiny lobsters.

B. Spiny lobsters are found in almost all warm seas - habitats in which migratory birds and sea turtles are also found.

C. Spiny lobsters, like migratory birds and sea turtles do have small sensors for sensing magnetic field variations.

D. In a laboratory simulation of the lobsters' natural environment, when magnetic fields were changed, lobsters changed their direction of movement.

E. Spiny lobster sense the magnetic field using their hind legs while birds and sea turtles have the sensors located in wings and feet respectively.

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Re: Spiny lobsters, found in tropical areas worldwide often leave their de   [#permalink] 24 Mar 2018, 20:32
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