In order to withstand tidal currents, juvenile horseshoe : GMAT Critical Reasoning (CR)
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 06 Dec 2016, 02:22

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In order to withstand tidal currents, juvenile horseshoe

Author Message
TAGS:

### Hide Tags

Director
Joined: 06 Jan 2008
Posts: 555
Followers: 2

Kudos [?]: 334 [0], given: 2

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

### Show Tags

21 May 2008, 05:22
00:00

Difficulty:

(N/A)

Question Stats:

50% (02:42) correct 50% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

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.
If you have any questions
New!
Senior Manager
Joined: 14 Mar 2007
Posts: 317
Location: Hungary
Followers: 2

Kudos [?]: 25 [0], given: 3

Re: CR - tidal currents [#permalink]

### Show Tags

21 May 2008, 06:03
May be E is correct. They shed their shell therefore barnacle cannot stick to their shell.
Director
Joined: 14 Oct 2007
Posts: 758
Location: Oxford
Schools: Oxford'10
Followers: 14

Kudos [?]: 211 [0], given: 8

Re: CR - tidal currents [#permalink]

### Show Tags

21 May 2008, 15:21
Premise: In strong currents, young crabs burrow, and adult crabs dont need to
Premise: Barnacles do not attach to burrowed crabs
Premise: Adults therefore have barnacles attached
Premise: In weak currents, young crabs do not burrow, but Still do not have barnacles.

Questions is asking how can the last premise be true? (surprising finding)

Answer is E, since yound crabs keep getting rid of their shells, their shells do not have the barnacle buildup
Manager
Joined: 22 Dec 2007
Posts: 158
Followers: 1

Kudos [?]: 10 [0], given: 0

Re: CR - tidal currents [#permalink]

### Show Tags

21 May 2008, 15:31
E for me.
Director
Joined: 06 Jan 2008
Posts: 555
Followers: 2

Kudos [?]: 334 [0], given: 2

Re: CR - tidal currents [#permalink]

### Show Tags

22 May 2008, 06:07
OA is E. Thanks
Senior Manager
Joined: 07 Jan 2008
Posts: 297
Followers: 1

Kudos [?]: 39 [0], given: 0

Re: CR - tidal currents [#permalink]

### Show Tags

23 May 2008, 12:05
E. Until they are fully grown, horseshoe crabs shed their shells and grow new ones
several times a year.

E clearly explains why young ones do NOT have barnicles clinged to their shells!
CEO
Joined: 17 May 2007
Posts: 2989
Followers: 60

Kudos [?]: 576 [0], given: 210

Re: CR - tidal currents [#permalink]

### Show Tags

25 May 2008, 03:31
Straight E - its the only one that helps explain the discrepancy.

saravalli 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.

Intern
Joined: 17 Mar 2008
Posts: 18
Followers: 0

Kudos [?]: 3 [0], given: 0

Re: CR - tidal currents [#permalink]

### Show Tags

26 May 2008, 14:38
E for me. it is a straight forward one, which explains the discrepancy.
Manager
Status: Dream big, work hard, and drink gallons of beer!
Joined: 11 Jun 2011
Posts: 212
Concentration: Finance, General Management
GMAT Date: 10-01-2011
WE: Web Development (Consulting)
Followers: 2

Kudos [?]: 44 [0], given: 33

Re: CR - tidal currents [#permalink]

### Show Tags

30 Jul 2011, 17:00
Although E is the most obvious choice here. Aren't we assuming here that shedding only affects areas with week tidal waves but not the other areas with the strong tidal waves? That means when they were found with barnacle population in the areas with strong tidal waves, they did not shed during that time. But when they were found in weak tidal waves, they were already done with shedding.
_________________

If I look absent-minded or insane, I am just living a dream of being successful. If you still wonder why I am like this, you have no idea how success tastes like!

Re: CR - tidal currents   [#permalink] 30 Jul 2011, 17:00
Similar topics Replies Last post
Similar
Topics:
5 In order to understand the dangers of the current real-estate bubble 7 26 Feb 2016, 01:29
11 Juvenile monkeys that are separated from their mothers 4 14 Oct 2013, 05:50
52 In order to withstand tidal currents, juvenile horseshoe 44 29 Jul 2010, 11:47
5 Unlike juvenile diabetes, which is a genetic condition 17 03 Oct 2009, 11:15
The tidal range at a particular location is the difference 8 29 Jul 2007, 13:47
Display posts from previous: Sort by