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

It is currently 13 Dec 2018, 04:10

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 in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
  • GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

     December 14, 2018

     December 14, 2018

     09:00 AM PST

     10:00 AM PST

    10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.

SC TIPS & TRICKS

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Sep 2018, 08:29
GRAMMAR PEOPLE C`MON ! :lol: ALL ABOUT ADVERBS

Senior SC Moderator
avatar
V
Joined: 22 May 2016
Posts: 2204
Premium Member CAT Tests
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Sep 2018, 18:50
1
dave13 wrote:
generis i am glad you like this initiative :) okay here is a sentence :-)

"I can write a book about how different people use the word “tomorrow” in each context, which in case is published, will become a best-seller."

Now question: is it a grammatically correct sentence? 

“which” logically must refer to the “book” but which is preceded by “context”, “tomorrow” isn’t it ambiguous sentence ? or is it correct ?

relative pronoun "which" is preceeded by comma and followed by dependant clause. is it correct ?

A MAJOR EXCEPTION TO THE TOUCH RULE:
an essential modifier can separate "which" and its noun referent


Excellent questions! Yes, except for an unimportant phrase that I think is unidiomatic, the sentence is grammatically correct.

I changed the sentence slightly but the underlying concept remains the same.
Sometimes an essential or vital or restrictive modifier prevents the nonessential modifier from directly touching the noun.

SLIGHTLY REWRITTEN. BOTH ARE CORRECT

I can write a book about how different people use the word “tomorrow” in each context, which if published will become a best-seller.
OR
I can write a book about how different people use the word “tomorrow” in each context, which, if published, will become a best-seller.*

Let's break them down
Subject: book
Essential modifier: "about how different people use the word “tomorrow” in each context"
WHICH refers to: book
Words that follow which: dependent clause. Possibly troublesome.
Removal does not change our ability to identify the noun.

Does removal change the core meaning of the sentence?
We have to take the author's structure at face value.
She does not believe that the "core" meaning changes.

I am not sure what bothers you about the word "tomorrow."
It presents no grammatical issues. She seems to be speaking about linguistics.

"Each context" is a little vague but not dangerous.
"Different contexts" would be better.

Restatement: An Exception to the Touch Rule

The COMMA + WHICH modifier usually requires that the noun it modifies be placed immediately before the modifier.
If an essential modifier follows the noun, however, the noun can be split from COMMA + WHICH — as long as what "which" should refer to is clear.
In this exception, "which" is not adjacent to the noun it modifies.

Why is this exception allowed? Essential modifiers trump non-essential modifiers.
An essential modifier can and often must be placed between the noun and the COMMA + WHICH modifier.

The "which" can "reach back" and over the prepositional phrase or other essential modifier (such as an appositive).

Typical Structure: NOUN + essential modifier + comma + which

If there is a second noun: X + preposition + Y + COMMA + WHICH

X and Y will be different enough (e.g. singular X / plural Y) that the noun to which "which" attaches is clear.

X will be a thing, Y will be a person, and "which" cannot apply to Y.
A good example is OG 2018 SC about Emily Dickinson's letters. In that question,
"COMMA which" is preceded by Emily Dickinson’s letters to Susan Huntington Dickinson.
Susan H. Dickson is a singular person.
"WHICH were written" must refer to letters because WHO should be used for people and the verb were is plural, unlike the recipient of the letters.


Here is another example from OG Verbal Review 2018, SC # 192
Global warming is said to be responsible for extreme weather changes, such as the heavy rains that led to flooding throughout the state of California,
causing more than $2 billion in damages, and the heat wave in the northeastern and Midwestern United States, which was also the cause of a great amount of damage and destruction.

Where the first phrase in bold occurred is an essential modifier.

Your question implicated an important exception. What is the source?
I ask because the phrase "in case is published" is not standard.

I hope this analysis helps!

*Compare, for example, "Some people may have also had answers to their security questions stolen, which, if published, could make it easier for hackers to gain access to other accounts that use the same security answers. Atlantic Monthly, "Yahoo Suffers History's Biggest Known Data Breach Yet," Dec 14, 2016, HERE (accessed 09/27/2018). The Atlantic is among a few journals with beautifully written prose and nearly flawless editing.
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Sep 2018, 23:50
Hello Generis :) thanks a lot for an important TIP and TRICK that i wanted to learn :)

generis wrote:
Your question implicated an important exception. What is the source?


I am pleased to inform you that the source of the question is dave13 :grin: I am the author of this sentence :)


generis wrote:
"Each context" is a little vague but not dangerous.
"Different contexts" would be better.


Agree, I at first wrote "different contexts" but since context was in plural i changed onto "each context" to create a bit a of ambiguity :)

Many thanks again and have a fantastic Friday ! :)
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 06 Oct 2018, 02:33
TIP: Learning grammar as a subject in isolation from reading is not effective. :)
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 06 Oct 2018, 02:39
TIP: READING STRATEGY THROUGH VISUALISATION IN MIND.
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 06 Oct 2018, 02:42

Hidden Stories of Chinese Migration and Culture Found in Giant Genetic Study



Lamb stew, hearty and fragrant, cooked until meat falls off the bone and served alongside thick, chewy noodles — this is the type of food that cuts through northern China’s winter chill.
Further south, warmer climates support more crops. Fresh, stir-fried greens might accompany dim sum in Guangdong or punctuate a spicy meal in Sichuan. Lychee, durian and other fruits ripen the air.
Nevertheless, the study suggests that simple clinical tests can be an effective resource for surveying the genetics of large populations and generating hypotheses for study, said Ekta Khurana, an assistant professor of computational genomics at Weill Cornell Medicine in New York who was not involved in the research.
“This can be expanded to include not just mothers, but all different people,” she said.

Comb through the DNA of Chinese people and you’ll find a trace of this culinary story, according to the largest-scale genetic study of Chinese people to date, published Thursday in Cell. The authors reported that a mutation of FADS2, a gene involved in metabolizing fatty acids, is more common in northern than southern populations, indicating a diet richer in animal content. It is one of an assortment of findings resulting from a sweeping analysis of genetic information from 141,431 participants.
The approach — a novel one using data from prenatal blood tests — came with a trade-off. Though researchers were able to cheaply sequence a large number of genomes, they had access to a small fraction of each person’s genome, much less than what genome-wide studies typically look at.

The authors used data from noninvasive prenatal testing for fetal trisomy, a condition that can cause Down syndrome. Pioneered in China, the test analyzes free-floating bits of fetal DNA in the mother’s blood and is administered for $100 or less throughout the country, said Xin Jin, a research scientist at BGI, a genome sequencing firm in Shenzhen, and an author of the paper. High-quality, whole genome sequencing, in comparison, costs about $1,000 per person.
The data set, which represented nearly every Chinese province and 37 out of 56 officially recognized ethnic groups, eclipsed many genome-wide studies, which often include only thousands, or tens of thousands, of participants.
But the team’s analysis covered a mere 10 percent or less of each person’s genome, while most rigorous genome-wide studies cover 80 percent or more, said Anders Albrechtsen, an associate professor at the University of Copenhagen and an author of the study.

To overcome this, the researchers relied on heavy computation and statistics, designing custom software that could infer missing DNA. They reported many preliminary but interesting insights.
For instance, the Han — comprising 92 percent of China’s population — were quite genetically homogeneous, mostly differing between the North and South.
This likely reflects governmental policies and job opportunities since 1949, which have largely driven migration eastward or westward, said Siyang Liu, a senior research scientist at BGI and lead author of the paper.
Her team identified several gene variants differing in frequency between northern and southern populations, related to immune response, bipolar disorder and earwax type.
Minority ethnic groups showed more genetic divergence than the Han, particularly Uyghurs and Kazakhs in Xinjiang and Mongols in Inner Mongolia.
This is noteworthy because sequencing studies are rarely done on ethnic minorities, even though findings can have important medical implications, said Charleston Chiang, an assistant professor at the University of Southern California’s Keck School of Medicine who was not involved in the research.
The researchers also diagnosed viruses in the mothers’ blood by checking DNA that did not align to the human genome against a database of viral sequences. They found a relatively high prevalence of hepatitis B and other viruses that can affect pregnancies, as well as a gene variant associated with roseola, which causes a high fever and rash in babies.

Last, to show that noninvasive pregnancy testing data can reveal associations between genes and specific traits, the scientists analyzed height and body mass index across their sample, finding 48 gene variants associated with height and 13 with body mass index. They also reported gene variants associated with maternal age and the likelihood of having twins.
Some of these associations had been reported in previous studies with Europeans, but the team also discovered new links, which underscores the importance of doing research in non-European populations, Dr. Jin said.
This study served as proof-of-concept, he added. His team is moving forward on evaluating prenatal testing data from more than 3.5 million Chinese people.
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 06 Oct 2018, 11:49

Deep in Human DNA, a Gift From the Neanderthals


Long ago, Neanderthals probably infected modern humans with viruses, perhaps even an ancient form of H.I.V. But our extinct relatives also gave us genetic defenses.
People of Asian and European descent — almost anyone with origins outside of Africa — have inherited a sliver of DNA from some unusual ancestors: the Neanderthals.
These genes are the result of repeated interbreeding long ago between Neanderthals and modern humans. But why are those genes still there 40,000 years after Neanderthals became extinct?
As it turns out, some of them may protect humans against infections. In a study published on Thursday, scientists reported new evidence that modern humans encountered new viruses — including some related to influenza, herpes and H.I.V. — as they expanded out of Africa roughly 70,000 years ago. Some of those infections may have been picked up directly from Neanderthals. Without immunity to pathogens they had never encountered, modern humans were particularly vulnerable.
“We were actually able to not only say, ‘Yes, modern humans and Neanderthals exchanged viruses,’” said David Enard, an evolutionary biologist at the University of Arizona and co-author of the new paper, published in the journal Cell. “We are able to start saying something about which types of viruses were involved.”
But if Neanderthals made us sick, they also helped keep us well. Some of the genes inherited from them through interbreeding also protected our ancestors from these infections, just as they protected the Neanderthals.

Lluis Quintana-Murci, a geneticist at the Pasteur Institute in Paris who was not involved in the new research, said that until now, scientists had not dreamed of getting such a glimpse at the distant medical history of our species.
“Five years ago, we would never have imagined that,” he said.
Our immune cells kill off viruses with an arsenal of weapons, such as antibodies and signals that cause infected cells to commit suicide. But Dr. Enard began his research by wondering if humans have evolved other ways to avoid getting infected.
Viruses can’t replicate on their own. They appropriate proteins inside our cells to do the heavy lifting, copying viral genes and building new shells to put them in. If those proteins were to change shape, however, it should become harder for viruses to use them to multiply.
“Instead of a strategy where you attack the virus, you run away from it,” said Dr. Enard.
To learn whether this is really a defense the body uses, Dr. Enard needed to find all the human proteins known to interact with at least one virus. But no such list existed. So he plowed through the scientific literature, looking for every example.
Once he had built a catalog of 1,300 proteins — it took four months — he studied their evolutionary history. By comparing these proteins across different species, he discovered that many have changed over the course of evolution.

In the several million years since our ancestors split from other primates, one-third of the adaptive changes in our proteins have occurred among those that interact with viruses. And this remarkable discovery led Dr. Enard and Dr. Dmitri Petrov, an evolutionary biologist at Stanford University, to wonder about Neanderthals.
The common ancestor both of modern humans and Neanderthals lived roughly 600,000 years ago, probably in Africa. Neanderthals left the continent long before modern humans and spread across a huge range, from the coast of Spain to Siberia, before becoming extinct.
From fossils, scientists have been able to reconstruct entire genomes of Neanderthals. And they’ve found that living people with non-African ancestry carry 1 percent or 2 percent Neanderthal DNA.

That remnant DNA got into our gene pool through repeated interbreeding. But after Neanderthals became extinct, their DNA gradually declined in our genomes.
It’s likely that most Neanderthal genes were bad for our health or reduced our fertility, and therefore were lost in modern humans. But certain Neanderthal genes became more common, probably because they provided some kind of evolutionary advantage.
In recent years, researchers have found that some of those genes encode proteins made by immune cells. They speculated that modern humans benefited by borrowing Neanderthal genes to fight infections.
Dr. Enard and Dr. Petrov had a more specific question: Did modern humans acquire genes that helped cells evade specific viruses by altering the shapes of cellular proteins?
The researchers pored through the genomes of living Asians and Europeans, and discovered a large fraction of those Neanderthal genes make proteins that interact with viruses.
The viruses that infected Neanderthals must have posed a major threat to modern humans as they left Africa. They had no immunity to these infections. But Neanderthals did, and through interbreeding, Neanderthals provided modern humans with genetic defenses.
“It’s like they brought the knife, but they also brought the shield,” Dr. Petrov said. Dr. Enard and Dr. Petrov also found clues about exactly what kinds of viruses these Neanderthal genes protect against.
In living humans, many of the proteins made by those genes interact only with influenza viruses, for example. Others interact only with H.I.V.
“We are not saying that viruses that infect the human population now come from Neanderthals,” said Dr. Enard. It’s clear, for example, that H.I.V. jumped into humans just a century ago from chimpanzees.
Instead, it’s likely that modern humans got infected with an ancient relative of H.I.V. Dr. Enard couldn’t say how they were exposed to the new pathogen — perhaps directly through sex with Neanderthals, or by eating animals that both modern humans and Neanderthals hunted.
But it’s clear that, for billions of people alive today, Neanderthal genes likely play an important role in defending against such viruses.
“We are not anything but the result of our past,” said Dr. Quintana-Murci.
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 06 Oct 2018, 12:03

EXPOSITORY TEXT - READING COMPREHENSION STRATEGIES



*****no one mentioned on gmatclub that GMAT tests expository texts :lol:*****

Expository text is typically structured with visual cues such as headings and subheadings that provide clear cues as to the structure of the information. The first sentence in a paragraph is also typically a topic sentence that clearly states what the paragraph is about.
Expository text also often uses one of five common text structures as an organizing principle:

    Cause and effect
    Problem and solution
    Compare and contrast
    Description
    Time order (sequence of events, actions, or steps)
VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 07 Oct 2018, 05:56
HOW TO AVOID RC ANSWER TRAPS

Director
Director
User avatar
V
Joined: 06 Jan 2015
Posts: 527
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Premium Member
Re: SC TIPS & TRICKS  [#permalink]

Show Tags

New post 26 Oct 2018, 23:39
1
1
dave13 You can also include this Independent & Subordinate Clauses & Conjunctions
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Oct 2018, 03:27
DAVE13`S READING COMPREHENSION TRICK :)


Read all the questions of the passage before reading the passage itself. Put the key words of each question on the paper, that way you will stay engaged when reading a passage and retain the key information.
Director
Director
User avatar
V
Joined: 06 Jan 2015
Posts: 527
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Premium Member
Re: SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Oct 2018, 03:37
dave13 wrote:
DAVE13`S READING COMPREHENSION TRICK :)


Read all the questions of the passage before reading the passage itself. Put the key words of each question on the paper, that way you will stay engaged when reading a passage and retain the key information.


dave13

Questions in GMATPrep appears one by one
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
Re: SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Oct 2018, 03:39
NandishSS wrote:
dave13 wrote:
DAVE13`S READING COMPREHENSION TRICK :)


Read all the questions of the passage before reading the passage itself. Put the key words of each question on the paper, that way you will stay engaged when reading a passage and retain the key information.


dave13

Questions in GMATPrep appears one by one


NandishSS so on official gmat exam questions will appear one by one ? :? :)
Director
Director
User avatar
V
Joined: 06 Jan 2015
Posts: 527
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE: Information Technology (Computer Software)
Premium Member
Re: SC TIPS & TRICKS  [#permalink]

Show Tags

New post 27 Oct 2018, 03:41
1
dave13 wrote:
NandishSS wrote:
dave13 wrote:
DAVE13`S READING COMPREHENSION TRICK :)


Read all the questions of the passage before reading the passage itself. Put the key words of each question on the paper, that way you will stay engaged when reading a passage and retain the key information.


dave13

Questions in GMATPrep appears one by one


NandishSS so on official gmat exam questions will appear one by one ? :? :)


dave13 YES ;)
_________________

आत्मनॊ मोक्षार्थम् जगद्धिताय च

Resource: GMATPrep RCs With Solution

VP
VP
User avatar
D
Joined: 09 Mar 2016
Posts: 1215
Re: SC TIPS & TRICKS  [#permalink]

Show Tags

New post 05 Dec 2018, 09:23
How to crack any GMAT RC passage
:) YAY!

    Use POE method / eliminate answer choices that are not relevant to the passage as if you were to tackle CR.

    After eliminating three wrong answer choices if you are confused between the two remaining answer choices, look carefully, which answer choice has more key words mentioned in the passage. Again don’t forget relevance to RC :)

    Pay VERY special attention to the first and the last sentences of each paragraph, when reading.

    Pay attention to transition words. By paying attention to these words as they appear in the passage, you can quickly summarize the main arguments and ideas of a passage and easily return to details when needed
    .

Addition

Addition words add on to an idea, or in the case of an argument, preceding reasons or premises. An author uses addition words to set up additional evidence, establish similar ideas or buffer a line of reasoning.

Furthermore; Further; In addition; Not only … but also; Also; Not to mention; Besides; And; What is more; In fact

Countering


Countering transition words signal a change in direction from one idea to a contrasting idea. Countering words help complicate or refute an original idea. The idea or argument of the passage was going in one direction, but now it’s going in the another direction.

But, yet, however, still, on the other hand, while conversely, though, when in fact, in contract

Reasoning

As the name suggests, reasoning transition words signal that the statement that follows them is a reason for a conclusion. The conclusion is a separate statement that may precede or follow one or more reasons.

Because, since, as, for, due to, being that, seeing that, in light of, in that, owing to

Concluding


In an argument, a conclusion is a statement that is given as a result of reasons or premises. Concluding transition words mark an idea or statement as a conclusion, which means that other statements in the passage act as reasons for this conclusion. Additionally, conclusions can be used as reasons in a new argument.

As a result, hence, so, because of this, as a consequence, therefore, consequently, thus, accordingly, ergo
GMAT Club Bot
Re: SC TIPS & TRICKS &nbs [#permalink] 05 Dec 2018, 09:23

Go to page   Previous    1   2   [ 35 posts ] 

Display posts from previous: Sort by

SC TIPS & TRICKS

  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®.