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

It is currently 10 Dec 2018, 15:01

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
  • Free lesson on number properties

     December 10, 2018

     December 10, 2018

     10:00 PM PST

     11:00 PM PST

    Practice the one most important Quant section - Integer properties, and rapidly improve your skills.
  • Free GMAT Prep Hour

     December 11, 2018

     December 11, 2018

     09:00 PM EST

     10:00 PM EST

    Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.

A certain cultivated herb is one of a group of closely related plants

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

Hide Tags

Intern
Intern
avatar
Joined: 12 Nov 2013
Posts: 40
A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post Updated on: 23 Oct 2018, 02:06
18
1
103
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

50% (01:27) correct 50% (01:49) wrong based on 3272 sessions

HideShow timer Statistics

A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.

In evaluating the argument, it would be most important to determine which of the following?


(A) Whether the herb can thrive in soil that does not have high concentrations of the toxic metals

(B) Whether others of the closely related group of plants also produce histidine in large quantities

(C) Whether the herb's high level of histidine production is associated with an unusually low level of production of some other amino acid

(D) Whether growing the herb in soil with high concentrations of the metals will, over time, reduce their concentrations in the soil

(E) Whether the concentration of histidine in the growing herb declines as the plant approaches maturity


Herb Growth

Step 1: Identify the Question

The words evaluating the argument in the question stem indicate that this is an Evaluate the Argument question.

Step 2: Deconstruct the Argument

Herb → grows w metals (toxic)

Study: Lots of hist, hist deac metals

Hist allows growth

Step 3: Pause and State the Goal

On Evaluate questions, the goal is to find a piece of information that would be important to know to determine whether the conclusion is valid. The correct answer could either strengthen or weaken the conclusion, depending upon the answer to the question. This argument takes findings from a study and concludes causation. Histidine renders the metal inert (inactive) so histidine allows for growth in soil with metal. What other information would make this assumed causation more or less likely?

Step 4: Work from Wrong to Right

(A) The argument states that the histidine allows the herb to grow in soil with high concentrations of metals. Whether or not the herb can also grow in soil without high concentrations of the metals does not affect this conclusion.

(B) CORRECT. The first sentence of the argument notes that several plants in the family can grow the soil with high concentrations of metals. If not all these plants have lots of histidine, then histidine is less likely to allow for such growth. On the other hand, if all the plants have histidine it is more likely to be the cause.

(B) The levels of other amino acids does not directly address whether histidine is what allows the plants to grow in the soil with high concentrations of metal.

(D) The argument is concerned with the growth of the plant, not how the concentration of metal may be changing.

(E) Changes in the levels of histidine in the plant over time do not directly relate to the conclusion. Even if levels of histidine decrease, there still could be enough histidine to deactivate the chemicals.

_________________

Kindly support by giving Kudos, if my post helped you!


Originally posted by harishbiyani8888 on 07 Sep 2015, 07:07.
Last edited by Bunuel on 23 Oct 2018, 02:06, edited 6 times in total.
Edited the question.
Most Helpful Expert Reply
Veritas Prep GMAT Instructor
User avatar
P
Joined: 16 Oct 2010
Posts: 8656
Location: Pune, India
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 08 Sep 2015, 21:00
51
16
sun01 wrote:
I have one doubt.

We have to evaluate that "Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils."
.

Argument clearly states that "A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants".

The information in option B provides that others of closely related groups produces the amino acids. How does this information impact the conclusion? if you say no, this clearly states that the other group doesn't have capability to grow in metal rich area. but it will not affect that herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.



I think you have misunderstood the argument a bit. Here is what it says:

Argument:

- A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.

So this herb is one of a group of plants. All plants in this group of plants thrive in soil with high concentration of metals. These metals are toxic to most other plants.

- Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test - tube solutions, renders these metals chemically inert.

We are given that this herb produces histidine which makes these metals inactive.

Conclusion: The herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.

We don't really know what makes the herb flourish in high metal soil. It could be histidine or it could be that it produces 10 other chemicals which allow it to flourish in metal rich soil. Since all these plants are closely related and only they are the ones who thrive in metal rich soils, it is likely that they have some common feature that helps them thrive. We are guessing its histidine. How do we find out whether our claim holds value?
If we evaluate whether the other plants in the group also produce histidine, it helps us. How? If other plants also produce lots of histidine, it becomes more likely that histidine is the one which helps these plants thrive. If other plants do not produce histidine, it becomes likely that they all produce some other chemical which helps them thrive.
Hence (B) helps us evaluate "what is it that allows this herb to grow in metal-rich soils?"

Answer (B)
_________________

[b]Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >

Most Helpful Community Reply
Manager
Manager
avatar
Joined: 17 Aug 2015
Posts: 98
Location: India
Concentration: Strategy, General Management
Schools: Duke '19 (II)
GMAT 1: 750 Q49 V42
GPA: 4
WE: Information Technology (Investment Banking)
GMAT ToolKit User
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 07 Sep 2015, 07:28
24
6
harishbiyani8888 wrote:
A certain cultivated herb is one a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists tsudying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test - tube solutions, renders these metals chemically inert. Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.

In evaluating the argument, it would be most important to determine which of the following?

A) Whether the herb can thrive in soil that does not have high concentrations of the toxic metals.
B) Whether others of the closely related group of plants also produce histidine in large quantities.
C) Whether the herb's high level of histidine production is associated with an unusually low level of production of some other amino acid
D) Whether growing the herb in soil with high concentrations of the metals will, over time, reduce their concentrations in the soil.
E) whether the concentration of histidine in the growing herb declines as the plant approaches maturity


(B). Here's why -

(A) -> Whether it thrives in other soil or not is not relevant to finding out if it thrives in metal rich soil because of histidine. This option is out of scope to what's asked.
(B) -> If true, will give us confidence that histidine is indeed a critical component of surviving the toxic metal rich soil. This would indicate that the mentioned herb has something common with other plants that thrive in the patch. Most likely, if this is the case, the common factor is the one that helps them survive.
(C) -> Irrelevant. Consider two cases - A. some other amino acid is produced in large quantities - it may be a compound not related to toxic survival (it could be something that causes leaves to grow bigger, for example). B. some other amino acid is produced in unusually low quantities - this does not help the case of plant surviving because of histidine. What other acids do, or their quantities is not helpful in finding if histidine is the key factor for survival.
(D) -> This is tricky. Suppose metal concentration is reduced over time. Also suppose that this is due to neutralizing effect of histidine. All this says is that the plant reduces concentration of metal. Doesn't say anything about whether histidine is the critical factor in survival. It could be anything else. The effect histidine has on the metal concentration may not be key to the plant's survival. Any other factor (say a toxic filtering mechanism in the plant's roots) may be the most critical. So, histidine's effect on soil is not the most helpful in finding out if histidine is THE most important feature that helps survival.
(E) -> Age of the plant is not in scope for the argument and is not needed to find if histidine is the true savior.

If this helps, help me with kudos! :)
_________________

If you like this post, be kind and help me with Kudos!

Cheers!

General Discussion
Manager
Manager
User avatar
Joined: 15 May 2010
Posts: 162
Location: India
Concentration: Strategy, General Management
WE: Engineering (Manufacturing)
Reviews Badge
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 07 Sep 2015, 17:30
I have one doubt.

We have to evaluate that "Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils."
.

Argument clearly states that "A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants".

The information in option B provides that others of closely related groups produces the amino acids. How does this information impact the conclusion? if you say no, this clearly states that the other group doesn't have capability to grow in metal rich area. but it will not affect that herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.
Veritas Prep GMAT Instructor
User avatar
P
Joined: 16 Oct 2010
Posts: 8656
Location: Pune, India
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 16 Sep 2015, 04:04
5
1
Responding to a pm:

Quote:
Can you please explain why 'E' cannot be the answer. If the concentration of histidine decreases with maturity then we may be conclude that it is not because of the histidine but because of some other substance, and if the concentration does not decrease then it is because of the histidine..


(E) doesn't help us evaluate the argument. Even if the concentration of histidine decreases after the plants mature, histidine could certainly be that substance which helps them grow from saplings into mature plants on metal rich soil. Also, perhaps the plants need less histidine to handle the metals after they mature - we do not know. Knowing whether the histidine levels decrease as the plants mature cannot help us judge whether histidine helps them survive in metal rich soils.
_________________

[b]Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >

Senior Manager
Senior Manager
avatar
S
Joined: 07 Sep 2014
Posts: 362
Concentration: Finance, Marketing
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 05 May 2016, 02:44
2
Premise : X herb grows in metal-rich soil just fine. because of amino acid prodn but not other plants of the same group. why? it is assumed that they don't produce histidine.

conclusion -> high histidine production helps herb to grow in hostile enviornment.

Prethinking:

What if other plants also produce histidine. if yes, then we can definetely say its not the case. it's some other factor. if no, then ok, it might be histidine thing.

Worst case scenario, even if other plants don't produce histidine, it is some other factor which we dont know yet leads to growth of X herb in metal rich sol. some temp thing. or something else. (But here we are considering that all other factor are same for both of them)

so straghtaway B.
Intern
Intern
avatar
B
Joined: 05 Nov 2012
Posts: 47
Reviews Badge
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 05 Aug 2016, 07:19
VeritasPrepKarishma wrote:
sun01 wrote:
I have one doubt.

We have to evaluate that "Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils."
.

Argument clearly states that "A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants".

The information in option B provides that others of closely related groups produces the amino acids. How does this information impact the conclusion? if you say no, this clearly states that the other group doesn't have capability to grow in metal rich area. but it will not affect that herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.



I think you have misunderstood the argument a bit. Here is what it says:

Argument:

- A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.

So this herb is one of a group of plants. All plants in this group of plants thrive in soil with high concentration of metals. These metals are toxic to most other plants.

- Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test - tube solutions, renders these metals chemically inert.

We are given that this herb produces histidine which makes these metals inactive.

Conclusion: The herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.

We don't really know what makes the herb flourish in high metal soil. It could be histidine or it could be that it produces 10 other chemicals which allow it to flourish in metal rich soil. Since all these plants are closely related and only they are the ones who thrive in metal rich soils, it is likely that they have some common feature that helps them thrive. We are guessing its histidine. How do we find out whether our claim holds value?
If we evaluate whether the other plants in the group also produce histidine, it helps us. How? If other plants also produce lots of histidine, it becomes more likely that histidine is the one which helps these plants thrive. If other plants do not produce histidine, it becomes likely that they all produce some other chemical which helps them thrive.
Hence (B) helps us evaluate "what is it that allows this herb to grow in metal-rich soils?"

Answer (B)


Hi Karishma,

Can you help me with the following confusion.

I was confused between B and C.
My confusion with C is that if histidine production is associated with low levels of production of other substances then maybe low level of other substances are providing protection against metals and not histidine. Can you please show me how to eliminate this?
Veritas Prep GMAT Instructor
User avatar
P
Joined: 16 Oct 2010
Posts: 8656
Location: Pune, India
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 08 Aug 2016, 04:55
1
nishatfarhat87 wrote:
VeritasPrepKarishma wrote:
sun01 wrote:
I have one doubt.

We have to evaluate that "Hence, the herb's high histidine production must be the key feature that allows it to grow in metal-rich soils."
.

Argument clearly states that "A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants".

The information in option B provides that others of closely related groups produces the amino acids. How does this information impact the conclusion? if you say no, this clearly states that the other group doesn't have capability to grow in metal rich area. but it will not affect that herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.



I think you have misunderstood the argument a bit. Here is what it says:

Argument:

- A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.

So this herb is one of a group of plants. All plants in this group of plants thrive in soil with high concentration of metals. These metals are toxic to most other plants.

- Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test - tube solutions, renders these metals chemically inert.

We are given that this herb produces histidine which makes these metals inactive.

Conclusion: The herb's high histidine production must be the key feature that allows it to grow in metal-rich soils.

We don't really know what makes the herb flourish in high metal soil. It could be histidine or it could be that it produces 10 other chemicals which allow it to flourish in metal rich soil. Since all these plants are closely related and only they are the ones who thrive in metal rich soils, it is likely that they have some common feature that helps them thrive. We are guessing its histidine. How do we find out whether our claim holds value?
If we evaluate whether the other plants in the group also produce histidine, it helps us. How? If other plants also produce lots of histidine, it becomes more likely that histidine is the one which helps these plants thrive. If other plants do not produce histidine, it becomes likely that they all produce some other chemical which helps them thrive.
Hence (B) helps us evaluate "what is it that allows this herb to grow in metal-rich soils?"

Answer (B)


Hi Karishma,

Can you help me with the following confusion.

I was confused between B and C.
My confusion with C is that if histidine production is associated with low levels of production of other substances then maybe low level of other substances are providing protection against metals and not histidine. Can you please show me how to eliminate this?


We are trying to establish a connection between histidine and metals. (B) helps us in evaluating that connection as discussed in my explanation above.

C) Whether the herb's high level of histidine production is associated with an unusually low level of production of some other amino acid

Here, we are trying to connect histidine to "some other amino acid". We don't know if "some other amino acid" will have any connection with metals. Shouldn't we instead try to connect Histidine to metals directly?
_________________

[b]Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >

Intern
Intern
User avatar
Joined: 23 Jan 2016
Posts: 1
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 16 Nov 2016, 12:24
Why is E incorrect?

It would be great if anyone can elaborate all the answer choices.....
_________________

stop complaining.. start doing...

Retired Moderator
User avatar
S
Joined: 14 Dec 2013
Posts: 2964
Location: Germany
Schools: German MBA
GMAT 1: 780 Q50 V47
WE: Corporate Finance (Pharmaceuticals and Biotech)
GMAT ToolKit User Premium Member Reviews Badge
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 22 Nov 2016, 03:07
3
1
TeeCee wrote:
Why is E incorrect?

It would be great if anyone can elaborate all the answer choices.....


Histidine production over the life cycle is not related to the conclusion. The conclusion is whether Histidine is the factor that allows these planst to survive in metal rich soils.

Option B:
Answer "yes": If other closely related plants (who grow in metal rich soils) also produce Histidine, then Histidine could be the factor for the survival of these plants in metal rich soils.
Answer "no": Histidine is not the factor that causes these plants to survive in metal rich soils - there should be some other factor.

"Yes" supports the conclusion and "no" opposes the conclusion. Therefore B is the correct choice.
(This yes / no approach is a basic technique to solve evaluate questions - if you cannot eliminate just by observation, use it for the other choices yourself. Please post again if you have doubts with a particular choice.)
Intern
Intern
avatar
S
Joined: 17 Feb 2013
Posts: 16
Location: India
GMAT 1: 570 Q46 V23
GMAT 2: 690 Q49 V34
GPA: 4
Premium Member Reviews Badge
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 02 Apr 2017, 06:54
1
amatya wrote:
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants.
Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Hence, the herb’s high histidine production must be the key feature that allows it to grow in metal-rich soils.
In evaluating the argument, it would be most important to determine which of the following?
(A) Whether the herb can thrive in soil that does not have high concentrations of the toxic metals
(B) Whether others of the closely related group of plants also produce histidine in large quantities
(C) Whether the herb’s high level of histidine production is associated with an unusually low level of production of some other amino acid
(D) Whether growing the herb in soil with high concentrations of the metals will, over time, reduce their concentrations in the soil
(E) Whether the concentration of histidine in the growing herb declines as the plant approaches maturity


Press kudos if you like the post


How to eliminate A and C ? I am not able to find the reasons for elimination. Thanks
Moderator
avatar
V
Joined: 21 Jun 2014
Posts: 1091
Location: India
Concentration: General Management, Technology
GMAT 1: 540 Q45 V20
GPA: 2.49
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 02 Apr 2017, 08:11
1
1
raoshahb wrote:

How to eliminate A and C ? I am not able to find the reasons for elimination. Thanks


All right! This is a very hard CR question. But this simply tests causality then why it is still so hard? This is because the question stem is not asking you to Strengthen or Weaken, it is indeed asking you to do both i.e. EVALUATE the argument. (Persional opinion on toughness of the question).

Quote:
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the growth of this herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Hence, the herb’s high histidine production must be the key feature that allows it to grow in metal-rich soils.


Pattern: If two things found happening together then one causes the other.

Mapping of the Pattern with the argument:

Herb is growing in the soil with high concentration of metals AND herb is producing large amount of histidine. (these two things are happening together)
Histidine is causing herb to grow in such soil

What would you do to strengthen such causality?

You would bring a fact to show that the causality is indeed correct. You would say there is no other cause or say the reverse of the causality is not true.

What would you do to Weaken such causality? – Just the opposite of what you would do to strengthen (as stated above)

(A) Whether the herb can thrive in soil that does not have high concentrations of the toxic metals

We are not talking about other kind of soil here. We are focusing on the production of histidine and growth in METAL RICH SOIL. Because if you find out whether heb thrive in non-metal-rich soil then it does not tell you about the causality.

All right suppose herb does grow in the non-metal-rich soil. Then herb MAY/MAY NOT be able to grow in METAL-RICH soil and if it may indeed grow then you do not know the casue/factor that helps it to grow in metal-rich soil as well.

Think of the case – METAL RICHNESS OF SOIL does nothing to the growth of herb.

(B) Whether others of the closely related group of plants also produce histidine in large quantities

What this choice actually says is – If all other herbs THAT ARE CLOSELY RELATED to this herb, also produce histidine then this could indeed be the THING/THE CAUSE/THE FACTOR for them to grow.

Isn’t it true that if something is happening to everyone of a certain kind then there could be some cause. If I tell you that in a city all children are falling sick since last week then you would want to believe if I say that a virus or bad water from the city supply was the cause?

So if you knew THAT what happens to this herb happens to all other herbs that are closely related to it then Evaluation is done.

(C) Whether the herb’s high level of histidine production is associated with an unusually low level of production of some other amino acid

Again, this does not tell anything about the said causality. This is bringing up another causality to test i.e. whether histidine production itself is caused/associated with different type of amino acid. We need to closely keep our focus on what are the major things argument discusses.

(D) Whether growing the herb in soil with high concentrations of the metals will, over time, reduce their concentrations in the soil

Soil is rich of METAL with high concentration. How the reduction in this concentration is related to the given causality? This is certainly not talking about the factors that are involved. Histidine make the herb grow in metal rich soil. Whether less metal reich soil would do or not is not the focus of discussion.

(E) Whether the concentration of histidine in the growing herb declines as the plant approaches maturity

It is told that LARGE AMOUNT of histidine is produced. Now if that is the case why are we bothering to evaluate whether concentration of histidine declines or not.
_________________

---------------------------------------------------------------
Target - 720-740
Project PS Butler - https://gmatclub.com/forum/project-ps-butler-practice-everyday-280904.html
http://gmatclub.com/forum/information-on-new-gmat-esr-report-beta-221111.html
http://gmatclub.com/forum/list-of-one-year-full-time-mba-programs-222103.html

Manager
Manager
User avatar
B
Joined: 20 Jan 2016
Posts: 89
Location: Canada
Schools: HBS '18
WE: Consulting (Other)
CAT Tests
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 11 May 2018, 13:40
Folks help me out here.

My logic on "E" - because if the histidine concentration declines as the plant approaches maturity, then maybe histidine was used to grow the plants and when growth was no longer needed (towards maturity), concentrations started declining.
My logic on "B" - if others of the closely related group of plants are also found to produce histidine in large quantities, it just says that this chemical is common in the group of closely related plants but it doesn't per se mean that its KEY in growth so I feel like its such a jump in conclusion here. Maybe Histidine is common in the group of the closely related plants because it serves other functions.

Please point me to where my logic is flawed (because clearly it is)
_________________

Migatte no Gokui

SC Moderator
User avatar
V
Joined: 23 Sep 2015
Posts: 1549
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: A certain cultivated herb is one of a group of closely related plants  [#permalink]

Show Tags

New post 05 Aug 2018, 00:05
1
oasis90

I might be late for the party, but let me know if this helps.

Lets visualize the situation. Let say this herb thrive in soil with mercury in it. mercury is toxic to most plants. while finding the answer of this strange phenomenon , Scientists observed this plant produce a lot of histidine which probably react with this metal and inert it. But to be sure of this conclusion scientists have to do what ?

In evaluating the argument, it would be most important to determine which of the following?

(A) Whether the herb can thrive in soil that does not have high concentrations of the toxic metals. ---- yes or no either way histidine is rendering with this metal or not is not clear.
(B) Whether others of the closely related group of plants also produce histidine in large quantities. --- so if no then how that group is surviving in such kind of soil? there must be something else. if yes then these all kind of plants has one ting in common, histidine that must be playing some role for such situation. over all not very lucrative choice for yes part lets keep it for later.
(C) Whether the herb's high level of histidine production is associated with an unusually low level of production of some other amino acid --- this choice is not doing much to our cause.
(D) Whether growing the herb in soil with high concentrations of the metals will, over time, reduce their concentrations in the soil. --- This seems a lucrative choice. in case of yes, it makes a case for us. but metal that reduces from the soil, how to justify it, is plant absorbing that metal ? is histidine is reacting? situation is not very clear.
(E) whether the concentration of histidine in the growing herb declines as the plant approaches maturity --- so with herb reaching to maturity, concentration of histidine declines, again as we did in previous choice, metal that reduces from the soil, how to justify it, is plant absorbing that metal ? is histidine is reacting? situation is not very clear.

B is the best answer.
_________________

Thanks!
Do give some kudos.

Simple strategy:
“Once you’ve eliminated the impossible, whatever remains, however improbable, must be the truth.”

Want to improve your Score:
GMAT Ninja YouTube! Series 1| GMAT Ninja YouTube! Series 2 | How to Improve GMAT Quant from Q49 to a Perfect Q51

My Notes:
Reading comprehension | Critical Reasoning | Absolute Phrases | Subjunctive Mood

GMAT Club Bot
Re: A certain cultivated herb is one of a group of closely related plants &nbs [#permalink] 05 Aug 2018, 00:05
Display posts from previous: Sort by

A certain cultivated herb is one of a group of closely related plants

  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®.