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More selective than most chemical pesticides in that they ordinarily d

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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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22 Mar 2019, 08:26
Why q6 Option B is wrong. "the extinction of a blue butterfly that had depended on the nests to shelter its offspring. " I didn't understand nests of what??
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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09 Apr 2019, 09:24
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mallya12 wrote:
Why q6 Option B is wrong. "the extinction of a blue butterfly that had depended on the nests to shelter its offspring. " I didn't understand nests of what??

The chain of events is a bit confusing on this one! Let's organize the information from the passage:

• A virus was introduced to control the rabbit population
• Large rabbit populations REDUCE ground cover (and "vegetation" is another word for "ground cover"). So, controlling the rabbit population INCREASED vegetation
• Increasing vegetation REDUCED underground ant nests
• The blue butterflies depended on underground ant nests to shelter their offspring. So, reducing the underground ant nests led to the extinction of the butterflies

Question #6 asks us what the passage suggests above the blue butterflies.

Quote:
(B) The blue butterfly's survival was indirectly dependent on sustaining large amounts of vegetation in its habitat.

From the information above, we know that the exact opposite of answer choice (B) is true. The blue butterflies depended on underground ants nests, which depended on reduced vegetation. For this reason, answer choice (B) is out.

I hope that helps!
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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28 Sep 2019, 02:51
Hello,
For Qs 3 i got confused between B and D since they've clearly stated an example of the butterfly and its extinction for B. Hence i chose B. Can someone kindly clear my doubt?

Posted from my mobile device
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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29 Sep 2019, 02:24
1
the passage is easy to read and understand. but to answer questions requires you to find out the place in the passage, which yield the information in the correct answer. positioning the place is time consuming and require patience. if you are hurried, you die. once you find the place, you can be confident with your choice.

the challenging is the fine the place in the passage dense with details and information.
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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30 Sep 2019, 15:28

Hi mate, there are multiple typos in the OP

Q3 E should be "with a larger species"

Q4 E should be "occur"
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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29 Oct 2019, 08:48
Chinmay1998 wrote:
Hello,
For Qs 3 i got confused between B and D since they've clearly stated an example of the butterfly and its extinction for B. Hence i chose B. Can someone kindly clear my doubt?

Posted from my mobile device

Question 3 asks us to identify which choice is mentioned in the passage as an indirect effect of using a biocontrol agent.

Here's choice (B):

Quote:
(B) An unintended proliferation of a nontarget animal species

This choice does not state any example outright, so we shouldn't fill in that information as a reason for keeping the choice around.

Instead, (B) tells us that the unintended proliferation of a nontarget animal species is an indirect effect of using a biocontrol agent. Proliferation means rapid increase, and there's no evidence for that taking place in the passage:

• The highlighted example describes what happened when rabbits were targeted by a biocontrol agent.
• After the biocontrol agent (a virus) was introduced, two nontarget animal species were affected: ants and blue butterflies.
• The indirect effect on ants was that underground ant nests were reduced.
• The indirect effect on the blue butterfly was extinction.

Reduction goes in the opposite direction of proliferation, and extinction is basically as far as you can get from proliferation. This is why (B) must be eliminated.

Here's choice (D):

Quote:
(D) Diminution of the positive effects conferred by a nontarget animal species

Again, this choice does not state any example outright, and never mentions the butterfly. We need to be precise when confirming whether this matches the passage.

Fortunately, when we check the passage, choice (D) is a spot-on match for what the author has written:

Quote:
However, biocontrol agents can negatively affect nontarget species by, for example, competing with them for resources: a biocontrol agent might reduce the benefits conferred by a desirable animal species by consuming a plant on which the animal prefers to lay its eggs.

This is why we keep (D) as the correct choice.

I hope this helps!
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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03 Dec 2019, 00:33
WHY in Q-6 answer cant be B?
Kindly clarify?
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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04 Jan 2020, 09:09
PreiteeRanjan wrote:
WHY in Q-6 answer cant be B?
Kindly clarify?

Please check out this post and let us know if you have further questions.

I hope that helps!
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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06 Jan 2020, 21:07
this scenario is called "easy passage, close answers".
in this situation, we well meet an easy passage , which we can understand it with easy. but the questions are hard, specifically, the questions 2,3 and 4, contain 2 answer choices which are close. both these choices look correct but one of them contain ONE wrong word. realizing to find ONE WRONG WORD is key
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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07 Jan 2020, 04:49
Question 3, why can't it be option E?
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Re: More selective than most chemical pesticides in that they ordinarily d  [#permalink]

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19 Jan 2020, 07:38
Can someone explain why Q3 option E is incorrect? is it because the passage only says that bio-control agents compete with non-target species for resources and not "larger species" per se?

Q4. Why is option E wrong?

Q5. Is option B wrong because the passage does not mention anything about bio-control agents having "direct adverse effects"?
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Re: More selective than most chemical pesticides in that they ordinarily d   [#permalink] 19 Jan 2020, 07:38

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