Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Jun 2211:30 AM EDT
-12:30 PM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
Jun 1903:00 AM PDT
-11:00 PM PDT
The Target Test Prep GMAT Flash Sale is LIVE! Get 25% off our game-changing course and save up to $450 today! Use code FLASH25 at checkout. This limited-time deal won’t last long, so grab your discount now!- Jun 19
03:00 AM PDT
-11:00 PM PDT
Get a massive $325 off the TTP OnDemand GMAT masterclass by using the coupon code FLASH25 at checkout. If you prefer learning through engaging video lessons, TTP OnDemand GMAT is exactly what you need. - Jun 20
10:00 AM PDT
-11:00 AM PDT
Class is officially in session! Join Charles Bibilos from GMAT Ninja and GMAC’s own Jaime Malatesta, Senior Psychometrician, as they simplify some of the complexities of GMAT scoring. 
Jun 2308:00 PM PDT
-09:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Jun 2811:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Jun 30
08:00 AM PDT
-11:59 PM PDT
Join us June 30th for 2 weeks of GMAT questions (just 8 per day) to help with your prep and to compete with your fellow GMAT Clubbers for a chance to win a prize fund of $30,000 for you and your team-mates!
29 May 2022, 22:28
Kudos
Bookmarks
Thanks MartyTargetTestPrep and why not B
29 May 2022, 22:51
Kudos
Bookmarks
Elite097
Thanks MartyTargetTestPrep and why not B
(B) doesn't really change anything. Regardless of what nutrients the insect contain that berries don't, it could be that the reason the thrushes eat the berries is that berries contain nutrients that the thrushes need and insects lack.Also, the fact that the passage says that thrushes have been eating insects "for most of the year" helps to make (B) incorrect since it's possible that any nutrients that thrushes get from insects but not from berries the thrushes have loaded up on already.
30 May 2022, 09:36
Kudos
Bookmarks
WillGetIt
Most of the year, the hermit thrush, a North American songbird, eats a diet consisting mainly of insects, but in autumn, as the thrushes migrate to their Central and South American wintering grounds, they feed almost exclusively on wild berries. Wild berries, however, are not as rich in calories as insects, yet thrushes need to consume plenty of calories in order to complete their migration. One possible explanation is that berries contain other nutrients that thrushes need for migration and that insects lack.
Which of the following, if true, most seriously calls into question the explanation given for the thrush’s diet during migration?
(A) Hermit thrushes, if undernourished, are unable to complete their autumn migration before the onset of winter.
(B) Insect species contain certain nutrients that are not found in wild berries.
(C) For songbirds, catching insects requires the expenditure of significantly more calories than eating wild berries does.
(D) Along the hermit thrushes’ migration routes, insects are abundant throughout the migration season.
(E) There are some species of wild berries that hermit thrushes generally do not eat, even though these berry species are exceptionally rich in calories.
Which of the following, if true, most seriously calls into question the explanation given for the thrush’s diet during migration?
(A) Hermit thrushes, if undernourished, are unable to complete their autumn migration before the onset of winter.
(B) Insect species contain certain nutrients that are not found in wild berries.
(C) For songbirds, catching insects requires the expenditure of significantly more calories than eating wild berries does.
(D) Along the hermit thrushes’ migration routes, insects are abundant throughout the migration season.
(E) There are some species of wild berries that hermit thrushes generally do not eat, even though these berry species are exceptionally rich in calories.
Elite097
Most of the other posts in this thread label the explanation as the conclusion. I think that if we apply the "Why Test," we can see that probably isn't the case. If we use the explanation as the conclusion and ask "why," we can't use the rest of the argument as the premise(s). Quite the opposite; the explanation is exactly that: the explanation. And that means it isn't the conclusion. Okay, so what's the conclusion? Must be the thing that's being explained.
Conclusion:
Rest of year: eat insects while not migrating
Autumn: eat wild berries while migrating even though insects have more calories
WHY?
The premise offered by the argument is that berries contain nutrients needed for migration that insects lack.
We are asked what might call that premise into question.
There are two things in play here: calories and nutrients. We are told that calories are needed for migration. We are trying to call into question the explanation for why the birds eat berries instead of insects during migration. Is it that berries have other nutrients? Or is there some other explanation?
Since the questions in this thread mostly hinge on B, C, and D, I'll stick to those:
(B) Insect species contain certain nutrients that are not found in wild berries.
Are those nutrients necessary for migration? If not, and if the nutrients in berries are necessary for migration, it would certainly make sense for the birds to switch to berries during migration.
(C) For songbirds, catching insects requires the expenditure of significantly more calories than eating wild berries does.
Calories are critical for migration. Insects contain more calories but also cost SIGNIFICANTLY more calories to acquire (be alert when GMAC uses intensity words like "significant" - it's usually not just a filler word for them). Chasing insects might not be the way the birds want to use their energy while migrating. Take the (pun intended) low-hanging fruit and keep moving.
(D) Along the hermit thrushes’ migration routes, insects are abundant throughout the migration season.
This does the opposite of providing an explanation for why they eat berries. If there are so many insects, how do we get to the conclusion that they eat berries during migration?
Answer choice C
