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In order to withstand tidal currents, juvenile horseshoe

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Re: In order to withstand tidal currents, juvenile horseshoe [#permalink]

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New post 10 Jul 2017, 14:34
Thanks for the replies!

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Re: In order to withstand tidal currents, juvenile horseshoe [#permalink]

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New post 04 Mar 2018, 04:28
noboru wrote:
In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles. Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow.

Which of the following, if true, most helps to explain the surprising finding?

(A) Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.
(B) Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.
(C) The strength of the tidal currents in a given location varies widely over the course of a day.
(D) A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food.
(E) Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.


(A) Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs. We already know this. Its burrowing that dislodges barnacles from the shells of horseshoe crabs and not tidal currents. So this does not help is explain the surprising findings
(B) Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest. This is an opposite answer.
If this were to be true, we would expect more barnacles not less.

(C) The strength of the tidal currents in a given location varies widely over the course of a day. Well the strength of the tidal current is out of scope.
(D) A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food. Well decrease in the ability of horseshoe crab to find food when they have a very large portion is not part of this argument
(E) Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year. This gives us the reason why juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow. Whenever the crabs shed their shells the barnacles are dislodged from their bodies.
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Re: In order to withstand tidal currents, juvenile horseshoe [#permalink]

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New post 06 May 2018, 00:19
In order to withstand tidal currents, juvenile horseshoe crabs frequently burrow in the sand. Such burrowing discourages barnacles from clinging to their shells. When fully grown, however, the crabs can readily withstand tidal currents without burrowing, and thus they acquire substantial populations of barnacles (Factset 1). Surprisingly, in areas where tidal currents are very weak, juvenile horseshoe crabs are found not to have significant barnacle populations, even though they seldom burrow(Factset 2).

Which of the following, if true, most helps to explain the surprising finding?

Additional:
1.IN Resolve Paradox type questions we need a option which shows a connection between Factset1 and Factset2
2.surprising finding should be related to juvenile horseshoe crabs


(A) Tidal currents do not themselves dislodge barnacles from the shells of horseshoe crabs.
No:Nothing about juvenile horseshoe crabs
(B) Barnacles most readily attach themselves to horseshoe crabs in areas where tidal currents are weakest.
No:Nothing about juvenile horseshoe crabs
(C) The strength of the tidal currents in a given location varies widely over the course of a day.
No:Nothing about juvenile horseshoe crabs
(D) A very large barnacle population can significantly decrease the ability of a horseshoe crab to find food.
No:Nothing about juvenile horseshoe crabs,no reason about thinking of food so its irrelevant.
(E) Until they are fully grown, horseshoe crabs shed their shells and grow new ones several times a year.
Yes:exactly does what we mentioned in the addition points.
Re: In order to withstand tidal currents, juvenile horseshoe   [#permalink] 06 May 2018, 00:19

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