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

It is currently 15 Oct 2018, 16:30

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

A certain species of desert lizard digs tunnels in which to lay its eg

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

Hide Tags

Senior SC Moderator
User avatar
V
Joined: 14 Nov 2016
Posts: 1315
Location: Malaysia
GMAT ToolKit User Premium Member CAT Tests
A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post Updated on: 03 Jun 2018, 09:44
4
10
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

74% (01:36) correct 26% (01:56) wrong based on 947 sessions

HideShow timer Statistics

The Official Guide for GMAT Verbal Review 2018

Practice Question
Question No.: CR 154
Page:

A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.

(B) The length of the incubation period varies somewhat from one tunnel to another.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.

(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.

_________________

"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!

Advanced Search : https://gmatclub.com/forum/advanced-search/


Originally posted by hazelnut on 31 May 2017, 19:53.
Last edited by Bunuel on 03 Jun 2018, 09:44, edited 1 time in total.
Edited the question.
Verbal Forum Moderator
User avatar
V
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2091
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 31 May 2017, 20:12
A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Type- Paradox
Boil it down - Eggs must incubate for several weeks before hatching and they fail to hatch if they are disturbed . Yet eggs are guarded only for a few days .
Pre- thinking - the factor that might cause disturbance might be absent after a few days or maybe the entrance to tunnel is hidden after the first few days

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area. - Correct
(B) The length of the incubation period varies somewhat from one tunnel to another. - Irrelevant
(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period. - Incorrect if this is true , then if further strengthens the essence of protecting the eggs
(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid. - iSWAT - If this is true , why do lizards guard for the first few days
(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid. - irrelevant - we are not concerned about the way

Answer A
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Director
Director
User avatar
P
Joined: 27 May 2012
Posts: 581
Premium Member
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 01 Jun 2017, 03:24
1
hazelnut wrote:
The Official Guide for GMAT Verbal Review 2018

Practice Question
Question No.: CR 154
Page:

A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.
(B) The length of the incubation period varies somewhat from one tunnel to another.
(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.
(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.
(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.

Note : Official answer will be provided once GMAT Official Guide 2018 Verbal Review released.


There is competition for real estate among lizards as there is relatively small area which they prefer to dig to lay eggs.
This competition is usually high during egg laying season.
Hence eggs are at high chances of being disturbed during this egg laying season as another lizard may accidentally dig up the same space which was used by other lizard.
Once this season is over , eggs are usually not disturbed.
So it makes sense to guard eggs until the egg laying season is over.

IMO answer A .
_________________

- Stne

Director
Director
User avatar
P
Joined: 26 Aug 2016
Posts: 644
Location: India
Concentration: Strategy, Marketing
GMAT 1: 690 Q50 V33
GMAT 2: 700 Q50 V33
GMAT 3: 730 Q51 V38
GPA: 4
WE: Information Technology (Consulting)
Premium Member Reviews Badge
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 01 Jun 2017, 04:05
we need some answer which states that it is unnecessary to guard after few days. A gives exactly what we wanted. Hence, I choose A

Target gmat against the odds.
Manager
Manager
User avatar
S
Joined: 23 May 2017
Posts: 248
Concentration: Finance, Accounting
WE: Programming (Energy and Utilities)
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 06 Jan 2018, 04:43
can anyone plz explain C.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

Isn't it telling that there is no connection of disturbance to the hatching capabilities.
_________________

If you like the post, please award me Kudos!! It motivates me

Manager
Manager
User avatar
B
Joined: 20 Jun 2017
Posts: 87
GMAT 1: 570 Q49 V19
CAT Tests
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 31 Mar 2018, 11:49
Leo8 wrote:
can anyone plz explain C.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

Isn't it telling that there is no connection of disturbance to the hatching capabilities.



The main point here is that the lizard needs to guard its tunnel for only a few days after laying its eggs, so we need an answer choice that lends credibility to this statement. Option C says that out of 15/20 eggs that the lizard lays only 10 hatch and we tend to assume that these 10 eggs will take a few days to hatch. Now how can we make that assumption, how do we know that 10 eggs will take a few days or many days to hatch. If 10 eggs were to take a few days to hatch then this indeed gives a reason as to why lizard guards its tunnel for only a few days but if these 10 eggs take many days to hatch then isn't the lizard expected to guard its tunnel for those many days.
VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1265
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member Reviews Badge CAT Tests
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 21 Apr 2018, 22:25
A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.[/quote]

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.

(B) The length of the incubation period varies somewhat from one tunnel to another.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.

(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.

I marked (D) , but after reading the explanations it is clear that (A) is better than (D).

B, C, and E are Irrelevant.

_________________

"Do not watch clock; Do what it does. KEEP GOING."

Senior Manager
Senior Manager
User avatar
D
Joined: 12 Feb 2015
Posts: 484
Premium Member CAT Tests
A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post Updated on: 05 Jun 2018, 22:47
1
Step 1:- Read the question stem:- Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?-----> identify the gap in logic!!

Step 2: Analyze the stimulus:-
1) A certain species of desert lizard digs tunnels in which to lay its eggs. ----> Lizards dig - tunnels - lay eggs
2) The eggs must incubate inside the tunnel for several weeks before hatching, -----> incubation period
3) and they fail to hatch if they are disturbed at any time during this incubation period. ------> don't disturb during incubation period
4) Yet these lizard guard their tunnels for only a few days after laying their eggs. -------> lizards don't guard for the entire length of incubation period

Step 2B: Read the question stem once again so that you can analyze in a better way. [Thanks jennpt -inserted this step after your feedback ]

Step 3: Analyze options, eliminate wrong ones and select the right one:-
Option (A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.---->tries to explain but is sounding slightly vague...read on!!

(B) The length of the incubation period varies somewhat from one tunnel to another.---->out of scope

Option (C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.----> even if the eggs are not disturbed only 10 out of 15/20 hatch. But what if the tunnel is disturbed? why doesn't the female lizard safegaurd for the entire length of incubation duration?

(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.------>out of scope, does not explain why the female lizard leave early?

(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid. .------>out of scope, does not explain why the female lizard leave early?

So we are down to A vs C, lets look more closely:-

Option (A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.----> makes much more sense now---you get the point---->notice the choice of words, "brief egg-laying season" -----> means many females get together to lays eggs. They dig the tunnels together. Some female lizards might dig early and some others might take more time. The ones who finish digging their tunnels early; enter the tunnel & lay their eggs but when they come outside they find some female lizards are still digging tunnels. They realize that these might cause disturbance to the eggs which they have themselves laid. They wait for all the females to finish digging their tunnels. Once everyone is done, they might leave early and not wait for the entire length of incubation period!! -----> BINGO---> makes much more sense now!!

Step 4:- Choose the correct answer choice!!
The problem with option (C) still remains...hence we can choose (A) over (C)---->Which happens to be the right answer :-)


jennpt - please consider reviewing or providing feedback!! Your comments are invaluable!!
_________________

"Please hit :thumbup: +1 Kudos if you like this post" :student_man:

_________________
Manish :geek:

"Only I can change my life. No one can do it for me"


Originally posted by CAMANISHPARMAR on 03 Jun 2018, 09:36.
Last edited by CAMANISHPARMAR on 05 Jun 2018, 22:47, edited 4 times in total.
Manager
Manager
avatar
B
Joined: 09 Jun 2017
Posts: 60
GMAT 1: 640 Q44 V35
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 04 Jun 2018, 11:17
Quote:
can anyone plz explain C.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

Isn't it telling that there is no connection of disturbance to the hatching capabilities.


that is when they make their best to protect their eggs , only a certain percent of eggs will succeed . The fail of the rest of the eggs is not in the lizards' control . That "natural "rule will happen with or without protection .
But if lizards don't make their best , a lower percent will succeed , because now they are facing tow negative factors : the natural law AND the disturbance .
so there is a connection between disturbance and hatching .
_________________

Hope this helps
Give kudos if it does

Intern
Intern
User avatar
B
Joined: 29 Dec 2013
Posts: 47
GMAT 1: 770 Q48 V51
Re: A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 05 Jun 2018, 12:05
2
Hi CAMANISHPARMAR

Good - you got there once you thought more deeply about answer choice A.

I have feedback about your analytical process: you may want to insert a step 2B in which you re-read the question stem and get more clear about exactly what you want from the correct answer. Because you read the question stem before you knew anything about the stimulus, your note is just "identify gap in logic." Which is fine to start with - but not specific enough to really help you with the answer choices. So I would come back to make it more specific before you get into the answers.

Before I considered the answer choices, I knew I needed something to explain the time difference issue -> why would the females only need to guard the tunnels for a few days and not the full several-week incubation period? What is the threat at the beginning that goes away? I needed to find an answer to explain this.

When it comes to reading and evaluating the answer choices, I call this step shopping for answer choices. Just like shopping in a store, if you go in the store with no clear idea of what you want, the salespeople or merchandising displays will have an easier time selling you crap that you don't really want or need.

Same goes for the GMAT. The clearer your shopping list, the better your answer.

If we have a clear shopping list after reading the stimulus and question stem, when we read answer choice A, it leaps off the page. "Oh, well, there we go!" Done. Of course, we read through the other answer choices just to be sure we haven't had a big misunderstanding ... but A does exactly what we are looking for.
_________________

Independent GMAT Coach with students on 6 continents

Personal 99th percentile score (770). Based in Berlin and previously in Paris, ich spreche auch deutsch/je parle aussi français.
With five years' experience, I am expert in coaching non-native speakers to outstanding performance.

Visit my University Tutor profile

Senior Manager
Senior Manager
User avatar
D
Joined: 12 Feb 2015
Posts: 484
Premium Member CAT Tests
A certain species of desert lizard digs tunnels in which to lay its eg  [#permalink]

Show Tags

New post 05 Jun 2018, 12:51
jennpt wrote:
Hi CAMANISHPARMAR

Good - you got there once you thought more deeply about answer choice A.

I have feedback about your analytical process: you may want to insert a step 2B in which you re-read the question stem and get more clear about exactly what you want from the correct answer. Because you read the question stem before you knew anything about the stimulus, your note is just "identify gap in logic." Which is fine to start with - but not specific enough to really help you with the answer choices. So I would come back to make it more specific before you get into the answers.

Before I considered the answer choices, I knew I needed something to explain the time difference issue -> why would the females only need to guard the tunnels for a few days and not the full several-week incubation period? What is the threat at the beginning that goes away? I needed to find an answer to explain this.

When it comes to reading and evaluating the answer choices, I call this step shopping for answer choices. Just like shopping in a store, if you go in the store with no clear idea of what you want, the salespeople or merchandising displays will have an easier time selling you crap that you don't really want or need.

Same goes for the GMAT. The clearer your shopping list, the better your answer.

If we have a clear shopping list after reading the stimulus and question stem, when we read answer choice A, it leaps off the page. "Oh, well, there we go!" Done. Of course, we read through the other answer choices just to be sure we haven't had a big misunderstanding ... but A does exactly what we are looking for.


Hi jennpt

Thanks for taking the time out amidst your busy schedule and giving me your feedback.

Your explanations/examples are very nice & feedback is really very helpful.

I have made a note of your points and I will insert step 2B in my approach to such questions.

I like your metaphor of "clear shopping list" but sometimes the GMAT answer choice are so confusing. I am able to do well on easier CR questions but unable to imagine my "shopping list" on tougher questions. I don't know how you could manage a V51...kudos to you...I am super impressed with you :)

Thanks once again!!
_________________

"Please hit :thumbup: +1 Kudos if you like this post" :student_man:

_________________
Manish :geek:

"Only I can change my life. No one can do it for me"

GMAT Club Bot
A certain species of desert lizard digs tunnels in which to lay its eg &nbs [#permalink] 05 Jun 2018, 12:51
Display posts from previous: Sort by

A certain species of desert lizard digs tunnels in which to lay its eg

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


Copyright

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®.