GMAT Question of the Day - Daily to your Mailbox; hard ones only
close

It is currently 18 Jun 2018, 21:41
Search
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar
CLICK HERE TO HIDE/SHOW EVENTS

During the day in Lake Constance, the zooplankton D. hyaline departs f

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 46144
Premium Member CAT Tests
Top Member of the Month
During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 03 Jun 2018, 12:50
1
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

86% (01:09) correct 14% (01:54) wrong based on 72 sessions

HideShow timer Statistics

During the day in Lake Constance, the zooplankton D. hyaline departs for the depths where food is scarce and the water cold. D. galeata remains near the warm surface where food is abundant. Even though D. galeata grows and reproduces much faster, its population is often outnumbered by D. hyaline.

Which of the following, if true, most helps to resolve the apparent paradox?


A. The number of species of zooplankton living at the bottom of the lake is twice that of species living at the surface.

B. Predators of zooplankton, such as whitefish and perch, live and feed near the surface of the lake during the day.

C. In order to make the most of scarce food resources, D.hyaline matures more slowly than D. galeata.

D. galeata clusters under vegetation during the hottest part of the day to avoid the Sun’s rays.

E. galeata produces twice as many offspring per individual in any given period of time as does D. hyaline.
Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

request expert reply
Manager
Manager
User avatar
B
Joined: 09 Aug 2017
Posts: 94
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 03 Jun 2018, 17:52
Is it C...If D. Hyaline matures more slowly than D. Galeta, population of D. Hyaline will outnumber the population of D Galeta.

C is good choice among given choices.
Intern
Intern
avatar
B
Joined: 11 Feb 2018
Posts: 38
CAT Tests
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 03 Jun 2018, 20:43
Clear B man.good question this.

B and C are the main contenders

B - Says why D.g population is less

C - Restates what is already given in the passage(D.g reproduces faster).Hence incorrect.
Manager
Manager
avatar
B
Joined: 19 Feb 2017
Posts: 127
GMAT ToolKit User
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 04 Jun 2018, 05:21
IMO the answer is B. Because only B gives a reason to why the population of D.G would decrease and D.H would remain unaffected.
Manager
Manager
User avatar
B
Joined: 09 Aug 2017
Posts: 94
During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 04 Jun 2018, 07:13
Even though D. galeata grows and reproduces much faster, its population is often outnumbered by D. hyaline.

Option B says Predators of Zooplankton D. zylen live and feed near surface during the day. Predators are feeding on D.Z. not on D.G.
Then how would population of D.G. reduce?

Please clear my confusion.

SajjitaKundu wrote:
IMO the answer is B. Because only B gives a reason to why the population of D.G would decrease and D.H would remain unaffected.
Intern
Intern
avatar
B
Joined: 16 May 2017
Posts: 28
Location: India
WE: General Management (Retail Banking)
CAT Tests
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 04 Jun 2018, 13:30
gvij2017 wrote:
Even though D. galeata grows and reproduces much faster, its population is often outnumbered by D. hyaline.

Option B says Predators of Zooplankton D. zylen live and feed near surface during the day. Predators are feeding on D.Z. not on D.G.
Then how would population of D.G. reduce?

Please clear my confusion.

SajjitaKundu wrote:
IMO the answer is B. Because only B gives a reason to why the population of D.G would decrease and D.H would remain unaffected.

The predators are of zooplankton and not of any specific kind. During day G is near the surface so predators eat more G.
_________________

"The harder you work the luckier you get"

Manager
Manager
avatar
S
Joined: 01 Feb 2017
Posts: 136
During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 05 Jun 2018, 13:29
Two possible explanations:

1. No. of eggs laid / offsprings produced by DH >DG:
Ans choice E is opposite to this info.

2. Life-span of DH >DG: Ans choice B.

Hence, IMO, Ans is choice B

Posted from my mobile device
Director
Director
User avatar
P
Joined: 26 Aug 2016
Posts: 600
Location: India
Concentration: Strategy, Marketing
Schools: Duke '21, Tepper '21, ISB '20, Erasmus '21
GMAT 1: 690 Q50 V33
GMAT 2: 700 Q50 V33
GPA: 4
WE: Consulting (Consulting)
Premium Member Reviews Badge CAT Tests
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f [#permalink]

Show Tags

New post 09 Jun 2018, 19:46
B . ONLY If D. Hyaline and D. galatia are both sub species of zooplankton .
Re: During the day in Lake Constance, the zooplankton D. hyaline departs f   [#permalink] 09 Jun 2018, 19:46
Print view
First unread post
Display posts from previous: Sort by

During the day in Lake Constance, the zooplankton D. hyaline departs f

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

Moderators: mikemcgarry, GMATNinja, GMATNinjaTwo, broall, nightblade354

Search for:


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions