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Turtles

Expert replies
by umaa » Fri Dec 12, 2008 2:51 pm
Loggerhead turtles live and bread in distinct groups, of which some are in pacific ocean and some are in atlantic. New evidence suggests that juvenile pacific loggerheads that feed near the baja peninsula hatch in Japanese waters 10,000 kilometers away.
ninety-five percent of the DNA samples taken from Baja turtles match those taken from turtles at the Japanese nesting sites.

Which one of the following, if true most seriously weakens the reasoning above?

A. Nesting sites of loggerhead turtles have been found off the pacific coast of north america several thousand kilometers north of the Baja peninsula

B. The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.

C. Loggerhead hatchlings in Japanese waters have been declining in numbers for the last decade while the number of nesting sites near the Baja peninsula has remained constant.

D. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

E. Commercial aquariums have been successfully breeding atlantic loggerheads with pacific loggerheads for the last five years.
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Source: — Critical Reasoning |

Re: Turtles

by iamcste » Fri Dec 12, 2008 3:10 pm
umaa wrote:Loggerhead turtles live and bread in distinct groups, of which some are in pacific ocean and some are in atlantic. New evidence suggests that juvenile pacific loggerheads that feed near the baja peninsula hatch in Japanese waters 10,000 kilometers away.
ninety-five percent of the DNA samples taken from Baja turtles match those taken from turtles at the Japanese nesting sites.

Which one of the following, if true most seriously weakens the reasoning above?

A. Nesting sites of loggerhead turtles have been found off the pacific coast of north america several thousand kilometers north of the Baja peninsula

B. The distance between nesting sites and feeding sites of Atlantic loggerhead turtles is less than 5,000 kilometers.

C. Loggerhead hatchlings in Japanese waters have been declining in numbers for the last decade while the number of nesting sites near the Baja peninsula has remained constant.

D. Ninety-five percent of the DNA samples taken from the Baja turtles match those taken from Atlantic loggerhead turtles.

E. Commercial aquariums have been successfully breeding atlantic loggerheads with pacific loggerheads for the last five years.

D for me

Atlantic and Pacific turtles live and bread in distinct groups means cannot be together at any given point of time

so, if 95% are from Atlantic...its impossible that 95% are from Pacific

C is close..but it doesnt talk about whose hatclings..no turtles mentioned


A strengthens

B -No mention about the baja turtles..so neither strenghtne nor weaken

E-out of scope -aquarium
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by niraj_a » Fri Dec 12, 2008 3:15 pm
D for me as well
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by 4meonly » Mon Dec 15, 2008 2:16 am
I am also with D:
90% genetic similarity suggests that Japanese turtles can be relatives as of pacific turtles as of atlantic turtles
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by ronniecoleman » Mon Dec 15, 2008 3:53 am
IMO D

we are made to think that the DNA found in japanese sites are similar to the one in baja and hence baja turtles hatches in japenese..

but what if the DNA of the baja turtles are also matching Atlantic turtles and hence it could be atlantic turtles hatching at the japenese sites
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by vish150783 » Mon Dec 15, 2008 5:31 am
D as well. Here the reason points to TWO causes, hence weakens the case.
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by umaa » Mon Dec 22, 2008 7:40 pm
OA D.
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by nicolette » Fri May 13, 2016 2:49 am
i agree with you, guys! i also think it's D
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