It is currently 23 Nov 2017, 04:49

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

V01-30

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

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42323

Kudos [?]: 133100 [0], given: 12408

V01-30 [#permalink]

Show Tags

New post 16 Sep 2014, 01:55
Expert's post
5
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

49% (01:16) correct 51% (01:44) wrong based on 45 sessions

HideShow timer Statistics

Scientists studying climate change have found that the effect of global warming is not only a higher planetary temperature, but also a universal change in seasons, specifically earlier springs and later autumns. Though some argue that this is an advantage because it presents a longer summer growing season, others fear that too many animal species will be unable to adapt and will become extinct.

Which of the following is the best piece of evidence to support the conclusion that a longer summer season may hasten the extinction of some animal species?


A. Squirrel and chipmunk species are unable either to consume or to store all the nuts and berries produced during a longer growing season.
B. Fungus species typically produce spores only once a year and are unable to produce enough spores to release spores again before the end of a longer growing season.
C. Butterfly species, which respond quickly to changes in temperature, hatch caterpillars, which undergo metamorphosis into butterflies earlier, flying away before bird species have hatched their young, which feed exclusively on caterpillars.
D. Salmon species that rely on changes in temperature to signal the start of annual migrations leave their freshwater birthplaces earlier, before they have fed sufficiently on freshwater insects to reduce their number.
E. Reptile species that hibernate during winter months must emerge from hibernation sooner and spend a longer time searching for food before mating in mid-summer.
[Reveal] 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

Kudos [?]: 133100 [0], given: 12408

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42323

Kudos [?]: 133100 [0], given: 12408

Re V01-30 [#permalink]

Show Tags

New post 16 Sep 2014, 01:55
Official Solution:


Scientists studying climate change have found that the effect of global warming is not only a higher planetary temperature, but also a universal change in seasons, specifically earlier springs and later autumns. Though some argue that this is an advantage because it presents a longer summer growing season, others fear that too many animal species will be unable to adapt and will become extinct.

Which of the following is the best piece of evidence to support the conclusion that a longer summer season may hasten the extinction of some animal species?


A. Squirrel and chipmunk species are unable either to consume or to store all the nuts and berries produced during a longer growing season.
B. Fungus species typically produce spores only once a year and are unable to produce enough spores to release spores again before the end of a longer growing season.
C. Butterfly species, which respond quickly to changes in temperature, hatch caterpillars, which undergo metamorphosis into butterflies earlier, flying away before bird species have hatched their young, which feed exclusively on caterpillars.
D. Salmon species that rely on changes in temperature to signal the start of annual migrations leave their freshwater birthplaces earlier, before they have fed sufficiently on freshwater insects to reduce their number.
E. Reptile species that hibernate during winter months must emerge from hibernation sooner and spend a longer time searching for food before mating in mid-summer.


Situation: Some scientists argue that climate change will result in a longer growing season and cause the extinction of some animal species.

Reasoning: Which supports the conclusion that a longer growing season will result in some animal species becoming extinct? The first sentence states the general context for the passage: concern over climate change. More specifically, scientists are concerned that changes in the timing of the spring, summer, and autumn will have dire consequences for animal species who do not adapt quickly enough. The correct answer choice will provide an example of a species negatively affected by a change in the timing of seasons.
  1. Squirrels and chipmunks will not be adversely affected by a surplus of food.
  2. Fungus species will not necessarily be harmed because their reproductive cycle will still produce spores once a year.
  3. This option correctly identifies the danger to bird species whose food supply disappears when caterpillars turn to butterflies and fly away before the bird young have hatched.
  4. This situation leaves a greater number of insects, but does not negatively affect either the salmon or the insects.
  5. This option does not provide sufficient detail to suggest that reptile species are threatened.

Answer: C
_________________

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

Kudos [?]: 133100 [0], given: 12408

Intern
Intern
avatar
B
Joined: 07 May 2016
Posts: 48

Kudos [?]: 13 [0], given: 18

Location: India
Concentration: Other, Entrepreneurship
Re: V01-30 [#permalink]

Show Tags

New post 24 Jul 2016, 06:00
The question stem is incorrect. The situation described in the argument states that climate change will have two effects.
First one longer growing season. Second some species might be extinct.
The question stem says that conclusion is longer growing season will hasten the extinction of the species, indicating a causal relationship between the longer growing season and the extinction of the species.

Secondly, I understand that option choice C doesn't effectively communicate the meaning.

Option choice C

Butterfly species that respond quickly to changes in temperature hatch caterpillars and undergo metamorphosis into butterflies earlier, flying away before bird species that feed exclusively on them have hatched their young.

Butterfly species hatch caterpillars and undergo metamorphosis into butterflies earlier.
It is not that butterfly species does two actions hatch caterpillars and undergo metamorphosis. Intended meaning is Butterfly species hatch caterpillars and these caterpillars undergo metamorphosis into butterflies earlier.

Further, I understand that young ones hatched by the bird species feed on the caterpillars and not the bird species feed on caterpillars.
The second part should be "flying away before the bird species have hatched their young ones that feed exclusively on caterpillars.

I understand that option C is worded incorrectly.

Experts kindly comment.

Kudos [?]: 13 [0], given: 18

Expert Post
Verbal Expert
User avatar
S
Joined: 14 Dec 2013
Posts: 3200

Kudos [?]: 3521 [0], given: 22

Location: Germany
Schools: HHL Leipzig
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
GMAT ToolKit User Premium Member Reviews Badge
V01-30 [#permalink]

Show Tags

New post 24 Jul 2016, 08:56
sahilmalhotra01 wrote:
The question stem is incorrect. The situation described in the argument states that climate change will have two effects.
First one longer growing season. Second some species might be extinct.
The question stem says that conclusion is longer growing season will hasten the extinction of the species, indicating a causal relationship between the longer growing season and the extinction of the species.

Secondly, I understand that option choice C doesn't effectively communicate the meaning.

Option choice C

Butterfly species that respond quickly to changes in temperature hatch caterpillars and undergo metamorphosis into butterflies earlier, flying away before bird species that feed exclusively on them have hatched their young.

Butterfly species hatch caterpillars and undergo metamorphosis into butterflies earlier.
It is not that butterfly species does two actions hatch caterpillars and undergo metamorphosis. Intended meaning is Butterfly species hatch caterpillars and these caterpillars undergo metamorphosis into butterflies earlier.

Further, I understand that young ones hatched by the bird species feed on the caterpillars and not the bird species feed on caterpillars.
The second part should be "flying away before the bird species have hatched their young ones that feed exclusively on caterpillars.

I understand that option C is worded incorrectly.

Experts kindly comment.


Thank you for the valid points. The stem and choice C have been modified to eliminate the ambiguity.

Kudos [?]: 3521 [0], given: 22

Manager
Manager
avatar
B
Joined: 23 Jan 2017
Posts: 56

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

CAT Tests
Re: V01-30 [#permalink]

Show Tags

New post 21 Oct 2017, 15:34
I do have a question. We are asked to find evidence to support the conclusion that a longer summer season may hasten the extinction of some animal species.

So the correct answer choice should indicate extinction of some animal species, not plants, birds or insects, isn't it?

(A) Squirrel and chipmunk are animals, but clearly surplus of food will not cause their extinction. Eliminated.
(B) Fungus is a plant, not animal. Although I agree with the reasoning given in the official explanation, the reason I rejected it was because it is neither an animal, nor the option choice gives any indication of any impact on any animal species if they are not able to produce spores again. Eliminated.
(D) This doesn't impact animal species at all. Besides, early migration of Salmon causes an increase in insect population, not extinction. Also, early migration of salmon doesn't indicate any risk to their own population. So Eliminated.
(E) Reptiles are animal, but this option doesn't hint anything towards their extinction. Eliminated.
(C) This option indicates extinction of birds, not animals. At the end I did choose this option, but I was not completely satisfied.

Is it really ok to generalize plants, insects, birds and animals as animals? Or maybe I am thinking in extreme depths now?

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

Re: V01-30   [#permalink] 21 Oct 2017, 15:34
Display posts from previous: Sort by

V01-30

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

Moderators: chetan2u, Bunuel



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®.