It is currently 19 Oct 2017, 22:55

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Neotropical coastal mangrove forests are usually “zonal,” with certain

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
4 KUDOS received
MBA Section Director
User avatar
P
Status: Back to work...
Affiliations: GMAT Club
Joined: 22 Feb 2012
Posts: 4712

Kudos [?]: 3711 [4], given: 2420

Location: India
City: Pune
GMAT 1: 680 Q49 V34
GPA: 3.4
WE: Business Development (Manufacturing)
GMAT ToolKit User Premium Member
Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 30 Sep 2013, 11:41
4
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
Question 1
00:00
A
B
C
D
E

Question Stats:

84% (02:22) correct 16% (02:27) wrong based on 363

HideShow timer Statistics

Question 2
00:00
A
B
C
D
E

Question Stats:

60% (00:39) correct 40% (00:37) wrong based on 373

HideShow timer Statistics

Question 3
00:00
A
B
C
D
E

Question Stats:

62% (01:00) correct 38% (00:38) wrong based on 367

HideShow timer Statistics

Question 4
00:00
A
B
C
D
E

Question Stats:

54% (00:58) correct 46% (01:12) wrong based on 104

HideShow timer Statistics

Practice Passage
Passage No.: 12
Questions: 61 to 63
Page: 44, 45

Neotropical coastal mangrove forests are usually “zonal,” with certain mangrove species found predominantly in the seaward portion of the habitat and other mangrove species on the more landward portions of the coast. The earliest research on mangrove forests produced descriptions of species distribution from shore to land, without exploring the causes of the distributions.

The idea that zonation is caused by plant succession was first expressed by J. H. Davis in a study of Florida mangrove forests. According to Davis’ scheme, the shoreline is being extended in a seaward direction because of the “land-building” role of mangroves, which, by trapping sediments over time, extend the shore. As a habitat gradually becomes more inland as the shore extends, the “land-building” species are replaced. This continuous process of accretion and succession would be interrupted only by hurricanes or storm flushings.

Recently the universal application of Davis’ succession paradigm has been challenged. It appears that in areas where weak currents and weak tidal energies allow the accumulation of sediments, mangroves will follow land formation and accelerate the rate of soil accretion; succession will proceed according to Davis’ scheme. But on stable coastlines, the distribution of mangrove species results in other patterns of zonation; “land building” does not occur.

To find a principle that explains the various distribution patterns, several researchers have looked to salinity and its effects on mangroves. While mangroves can develop in fresh water, they can also thrive in salinities as high as 2.5 times that of seawater. However, those mangrove species found in freshwater habitats do well only in the absence of competition, thus suggesting that salinity tolerance is a critical factor in competitive success among mangrove species. Research suggests that mangroves will normally dominate highly saline regions, although not because they require salt. Rather, they are metabolically efficient (and hence grow well) in portions of an environment whose high salinity excludes plants adapted to lower salinities. Tides create different degrees of salinity along a coastline. The characteristic mangrove species of each zone should exhibit a higher metabolic efficiency at that salinity than will any potential invader, including other species of mangrove.

[Reveal] Spoiler:
D

1. The primary purpose of the passage is to

(A) refute the idea that the zonation exhibited in mangrove forests is caused by adaptation to salinity
(B) describe the pattern of zonation typically found in Florida mangrove forests
(C) argue that Davis’ succession paradigm cannot be successfully applied to Florida mangrove forests
(D) discuss hypotheses that attempt to explain the zonation of coastal mangrove forests
(E) establish that plants that do well in saline forest environments require salt to achieve maximum metabolic efficiency


[Reveal] Spoiler:
B

2. According to the passage, the earliest research on mangrove forests produced which of the following?

(A) Data that implied random patterns of mangrove species distribution
(B) Descriptions of species distributions suggesting zonation
(C) Descriptions of the development of mangrove forests over time
(D) Reclassification of species formerly thought to be identical
(E) Data that confirmed the “land-building” role of mangroves


[Reveal] Spoiler:
E

3. It can be inferred from the passage that Davis’ paradigm does NOT apply to which of the following?

(A) The shoreline of Florida mangrove forests first studied by Davis
(B) A shoreline in an area with weak currents
(C) A shoreline in an area with weak tidal energy
(D) A shoreline extended by “land-building” species of mangroves
(E) A shoreline in which few sediments can accumulate


[Reveal] Spoiler:
C

4. Information in the passage indicates that the author would most probably regard which of the following statements as INCORRECT?

(A) Coastal mangrove forests are usually zonal.
(B) Hurricanes interrupt the process of accretion and succession that extends existing shorelines.
(C) Species of plants that thrive in a saline habitat require salt to flourish.
(D) Plants with the highest metabolic efficiency in a given habitat tend to include other plants from that habitat.
(E) Shorelines in areas with weak currents and tides are more likely to be extended through the process of accumulation of sediment than are shorelines with strong currents and tides.

[Reveal] Spoiler: Question #1 OA
[Reveal] Spoiler: Question #2 OA
[Reveal] Spoiler: Question #3 OA
[Reveal] Spoiler: Question #4 OA

_________________

Every Wednesday: Meet MBA Experts in Chat Room and Ask Your Most-Pressing MBA Admission Questions to them in a Live Chat.

Must Read Forum Topics Before You Kick Off Your MBA Application

New GMAT Club Decision Tracker - Real Time Decision Updates


Last edited by hazelnut on 12 Sep 2017, 06:44, edited 1 time in total.
Added question 4.

Kudos [?]: 3711 [4], given: 2420

Senior Manager
Senior Manager
avatar
Joined: 06 Aug 2011
Posts: 390

Kudos [?]: 234 [0], given: 82

Re: Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 01 Mar 2014, 02:05
I chose DBD.. tuk 8 mints

can anyone send official explanation..?? plz
_________________

Bole So Nehal.. Sat Siri Akal.. Waheguru ji help me to get 700+ score !

Kudos [?]: 234 [0], given: 82

2 KUDOS received
Current Student
avatar
Joined: 25 Feb 2014
Posts: 56

Kudos [?]: 7 [2], given: 18

Concentration: Healthcare, Finance
GMAT 1: 700 Q49 V35
GPA: 3.5
Reviews Badge
Re: Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 22 Apr 2015, 07:44
2
This post received
KUDOS
Here is my attempt at an explanation of my choices (these are not official nor have I seen OE):
Answers: 1) D 2) B 3) E
Q1 :- The primary purpose of the passage is to

(A) refute the idea that the zonation exhibited in mangrove forests is caused by adaptation to salinity -- Salinity principle is discussed in Para-4 and the author does not refute this principle
(B) describe the pattern of zonation typically found in Florida mangrove forests -- Florida is merely the location where J.H. Davis conducted his research
(C) argue that Davis’ succession paradigm cannot be successfully applied to Florida mangrove forests -- Author does not argue Davis' paradigm can't work in Florida. The author brings up other researchers challenging the paradigm in non-weak current/tidal energy locations
(D) discuss hypotheses that attempt to explain the zonation of coastal mangrove forests -- General statement encompassing the entire passage and the discussion that takes place
(E) establish that plants that do well in saline forest environments require salt to achieve maximum metabolic efficiency -- Only partial scope as this is mention in the fourth paragraph only

Q2 :- According to the passage, the earliest research on mangrove forests produced which of the following?

(A) Data that implied random patterns of mangrove species distribution -- No random pattern mentioned
(B) Descriptions of species distributions suggesting zonation -- "The earliest research on mangrove forests produced descriptions of species distribution from shore to land, without exploring the causes of the distributions"
(C) Descriptions of the development of mangrove forests over time -- Described distribution, not development
(D) Reclassification of species formerly thought to be identical -- Out of Scope
(E) Data that confirmed the “land-building” role of mangroves -- No data given

Q3 :- It can be inferred from the passage that Davis’ paradigm does NOT apply to which of the following?

(A) The shoreline of Florida mangrove forests first studied by Davis -- Davis' paradigm does apply to the shoreline of Florida
(B) A shoreline in an area with weak currents -- Davis' paradigm does apply to areas with weak currents
(C) A shoreline in an area with weak tidal energy -- Davis' paradigm does apply to areas with weak tidal energy
(D) A shoreline extended by “land-building” species of mangroves -- if the paradigm occurs then "land-building" takes place
(E) A shoreline in which few sediments can accumulate -- Combining "But on stable coastlines, the distribution of mangrove species results in other patterns of zonation; “land building” does not occur." and "“land-building” role of mangroves, which, by trapping sediments over time, extend the shore" we can infer that with few accumulated sediments, the paradigm will not work (this is precisely why the paradigm was challenged by other researchers)

Kudos [?]: 7 [2], given: 18

Top Contributor
1 KUDOS received
Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Joined: 05 Nov 2012
Posts: 531

Kudos [?]: 620 [1], given: 606

Concentration: Technology, Other
GMAT ToolKit User Premium Member Reviews Badge
Re: Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 03 Jul 2016, 07:04
1
This post received
KUDOS
Top Contributor
All correct. 8 mins.
~4 mins for Para.Poor timing on Para reading.
_________________

--------------------------------------------------------
Regards :)

Kudos [?]: 620 [1], given: 606

BSchool Forum Moderator
User avatar
D
Status: Aiming MBA
Joined: 18 Jul 2015
Posts: 2514

Kudos [?]: 796 [0], given: 64

Location: India
Concentration: Healthcare, Technology
GMAT 1: 710 Q50 V35
GPA: 3.65
WE: Information Technology (Health Care)
Premium Member Reviews Badge
Re: Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 18 Aug 2017, 03:46
7 mins. All correct. Easy Passage.

Bumping for those who wanna solve official passage.
_________________

How I improved from V21 to V40! ?

Kudos [?]: 796 [0], given: 64

VP
VP
User avatar
D
Joined: 14 Nov 2016
Posts: 1160

Kudos [?]: 1177 [0], given: 415

Location: Malaysia
GMAT ToolKit User Premium Member CAT Tests
Re: Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 12 Sep 2017, 06:47
abhimahna wrote:
7 mins. All correct. Easy Passage.

Bumping for those who wanna solve official passage.


abhimahna, Could you help with question 3?
_________________

"Be challenged at EVERY MOMENT."

“Strength doesn’t come from what you can do. It comes from overcoming the things you once thought you couldn’t.”

"Each stage of the journey is crucial to attaining new heights of knowledge."

Rules for posting in verbal forum | Please DO NOT post short answer in your post!

Kudos [?]: 1177 [0], given: 415

Intern
Intern
avatar
B
Joined: 29 May 2017
Posts: 17

Kudos [?]: 5 [0], given: 55

Location: India
GMAT 1: 530 Q45 V19
GMAT 2: 640 Q49 V28
GPA: 3.45
WE: Operations (Energy and Utilities)
Reviews Badge
Neotropical coastal mangrove forests are usually “zonal,” with certain [#permalink]

Show Tags

New post 27 Sep 2017, 09:27
hazelnut, For question 4, where does the passage mention about Option-D?

Kudos [?]: 5 [0], given: 55

Neotropical coastal mangrove forests are usually “zonal,” with certain   [#permalink] 27 Sep 2017, 09:27
Display posts from previous: Sort by

Neotropical coastal mangrove forests are usually “zonal,” with certain

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.