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# Parasitic wasps lay their eggs directly into the eggs of

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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03 Jun 2015, 11:17
ruhi wrote:
Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg, If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.

Which of the following conclusions can properly be drawn from the information above?

A. The size of the smallest host egg that a wasp could theoritically parasitize can be determined from the wasp's egg- laying behavior.

B. Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.

E. Parasitic wasps use visual clues to calculate the size of a host egg.

The passage always talks about no of eggs then why we are taking "size" in consideration?

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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03 Jun 2015, 21:41
Expert's post
1
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ssriva2 wrote:
ruhi wrote:
Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg, If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.

Which of the following conclusions can properly be drawn from the information above?

A. The size of the smallest host egg that a wasp could theoritically parasitize can be determined from the wasp's egg- laying behavior.

B. Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.

E. Parasitic wasps use visual clues to calculate the size of a host egg.

The passage always talks about no of eggs then why we are taking "size" in consideration?

The passage talks about the size of the HOST EGG. The wasp lays its own eggs INSIDE a HOST EGG (someone else's egg). How many eggs should it lay depends on the SIZE of the host egg. Say, if the HOST egg is large, it will lay 20 eggs inside it and if the host egg is small, it will lay 10 eggs inside it etc.
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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03 Jun 2015, 23:25
A
The argument states that wraps are selective in laying eggs and lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg, thus A can be draw out
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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26 Sep 2015, 18:44
Can't understand why B is not the right answer. From the statements we can clearly see that the survival rate of the eggs depends purely on the # of eggs laid.
I understand you can eliminate A as well....
Stuck btw A & B

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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21 Jan 2016, 10:55
A. no other option is close enough to qualify for a valid conclusion.
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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21 Jan 2016, 20:37
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Shreks1190 wrote:
Can't understand why B is not the right answer. From the statements we can clearly see that the survival rate of the eggs depends purely on the # of eggs laid.
I understand you can eliminate A as well....
Stuck btw A & B

B. Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

We cannot conclude (B) from the argument. Host insects may have some effective defines. Perhaps, they are able to defend their eggs 8 out of 10 times - we don't know. The argument only tells us how the parasitic wasps lay their eggs whenever they are able to.

On the other hand, we can conclude (A)
A. The size of the smallest host egg that a wasp could theoritically parasitize can be determined from the wasp's egg- laying behavior.
Wasp's egg laying behaviour depends on the size of the host egg. Smaller the host egg, fewer eggs the wasp lays. So theoretically, seeing how it lays fewer and fewer eggs in smaller and smaller host eggs, we can find the size of the host egg in which it can lay only one egg.
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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23 Jan 2016, 10:28
ruhi wrote:
Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg, If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.

Which of the following conclusions can properly be drawn from the information above?

A. The size of the smallest host egg that a wasp could theoritically parasitize can be determined from the wasp's egg- laying behavior.

B. Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.

E. Parasitic wasps use visual clues to calculate the size of a host egg.

The correct approach to attack a conclusion question is to find out the conclusion in an argument. As we can see that the conclusion of the argument is closely similar to A. It should be the answer.

B - Argument says nothing about the Host insects. Cannot be concluded.
C - Can be a possible choice. Although, 'experience' is not mentioned in the argument.
D - Restates the premise.
E - Out of context. Cannot be concluded.

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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26 Apr 2017, 06:55
Options B,C,D,E present new information therefore are to be discraded.
So, by PoE only A is lefted.

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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17 May 2017, 08:12
I don't understand how A can be correct, besides using process of elimination. The passage tells us that wasps lay eggs directly into the host egg in exactly the right amount. "A" says that we can figure out the smallest host egg a wasp can theoretically parasitize based on their egg-laying behavior. However, we know that their egg-laying behavior is dependent on the size of the host egg. Therefore wouldn't their egg-laying behavior change for each size of host egg? If that's the case, how could someone use their egg-laying behavior, which is constantly changing, to figure out anything?

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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18 May 2017, 03:05
jy295 wrote:
I don't understand how A can be correct, besides using process of elimination. The passage tells us that wasps lay eggs directly into the host egg in exactly the right amount. "A" says that we can figure out the smallest host egg a wasp can theoretically parasitize based on their egg-laying behavior. However, we know that their egg-laying behavior is dependent on the size of the host egg. Therefore wouldn't their egg-laying behavior change for each size of host egg? If that's the case, how could someone use their egg-laying behavior, which is constantly changing, to figure out anything?

The egg laying behaviour has a pattern.
For a small egg (say 3 cm inside radius assuming spherical egg), the wasp lays few eggs, say 2.
For a larger egg (say 5 cm inside radius assuming spherical egg), the wasp would lay more eggs, say 5.
For an even larger egg (say 8 cm inside radius assuming spherical egg), the wasp would lay even more eggs, say 10.
and so on...

Wasps follow this pattern. Extrapolating it, we can theoretically find the size of the smallest egg that a wasp could parasitise.
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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18 May 2017, 03:15
VeritasPrepKarishma wrote:
jy295 wrote:
I don't understand how A can be correct, besides using process of elimination. The passage tells us that wasps lay eggs directly into the host egg in exactly the right amount. "A" says that we can figure out the smallest host egg a wasp can theoretically parasitize based on their egg-laying behavior. However, we know that their egg-laying behavior is dependent on the size of the host egg. Therefore wouldn't their egg-laying behavior change for each size of host egg? If that's the case, how could someone use their egg-laying behavior, which is constantly changing, to figure out anything?

The egg laying behaviour has a pattern.
For a small egg (say 3 cm inside radius assuming spherical egg), the wasp lays few eggs, say 2.
For a larger egg (say 5 cm inside radius assuming spherical egg), the wasp would lay more eggs, say 5.
For an even larger egg (say 8 cm inside radius assuming spherical egg), the wasp would lay even more eggs, say 10.
and so on...

Wasps follow this pattern. Extrapolating it, we can theoretically find the size of the smallest egg that a wasp could parasitise.

Thanks for the response! I couldn't visualize how the process would work in practice, so didn't understand that the size of the wasp egg is static. Was picturing a wasp that could alter their eggs to fit any size of host egg, which I realize the question doesn't imply at all. This was really helpful, thanks!

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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29 Sep 2017, 03:55
can some one through some light. This question does not seem like a GMAT Like Question

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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29 Sep 2017, 05:44
ramsahoo wrote:
can some one through some light. This question does not seem like a GMAT Like Question

It's from GMATPrep. It is a GMAT question!
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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17 Oct 2017, 16:49
5elements wrote:
My pick : A

A. The size of the smallest host egg that a wasp could theoretically parasitize can bedetermined from the wasps egg-laying behavior.

since the wasps somehow know how many eggs to lay in order for their larvae to survive, one can in theory compute the smallest size based on their egg-lay behavior ..

As you can see below - all the other choices can be eliminated with lot more certainity, leaving just "A"

B. Host insects lack any effective defenses against the form of predation practiced byparasitic wasps.

lack of effective defensive mechanism in the host - is out of scope

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of differenthost species.
nothing in the argument talks about how the wasps know how many eggs to lay - hence out of scope

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae morequickly than would laying too many eggs.

- the argument is not about which method will lead to the quicker end of the wasp larvae - so we cannot come to this conclusion that one method will lead to quick death than the other

E. Parasitic wasps use visual clues to calculate the size of a host egg.
- again, how the wasps know how many eggs to lay is out of scope

How the size can be determined from behavior?! in the passage we see they just know( based on instinct or experience, we don't know) but I cannot find correlation between choice A and passage

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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17 Oct 2017, 20:56
soodia wrote:
5elements wrote:
My pick : A

A. The size of the smallest host egg that a wasp could theoretically parasitize can bedetermined from the wasps egg-laying behavior.

since the wasps somehow know how many eggs to lay in order for their larvae to survive, one can in theory compute the smallest size based on their egg-lay behavior ..

As you can see below - all the other choices can be eliminated with lot more certainity, leaving just "A"

B. Host insects lack any effective defenses against the form of predation practiced byparasitic wasps.

lack of effective defensive mechanism in the host - is out of scope

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of differenthost species.
nothing in the argument talks about how the wasps know how many eggs to lay - hence out of scope

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae morequickly than would laying too many eggs.

- the argument is not about which method will lead to the quicker end of the wasp larvae - so we cannot come to this conclusion that one method will lead to quick death than the other

E. Parasitic wasps use visual clues to calculate the size of a host egg.
- again, how the wasps know how many eggs to lay is out of scope

How the size can be determined from behavior?! in the passage we see they just know( based on instinct or experience, we don't know) but I cannot find correlation between choice A and passage

The argument tells us - "Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg"
So if the host egg is large in size, the wasp lays more eggs in it, but if it is smaller in size, the wasp lays fewer eggs inside it.
By observing their behaviour (how many eggs in which size host egg), we can extrapolate to find the size in which the wasp will, theoretically, lay only 1 egg. So any smaller than that and the wasp would lay no egg in it.
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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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20 Oct 2017, 23:06
A. The size of the smallest host egg that a wasp could theoritically parasitize can be determined from the wasp's egg- laying behavior.
C. Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

The final fight is b/w A and C. If you carefully look at C..it uses an additional info 'experience' which is not stated in the premise .So eliminate A and choose A with a wide smile.....:D

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Re: Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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21 Oct 2017, 00:24
VeritasPrepKarishma wrote:
soodia wrote:
5elements wrote:
My pick : A

A. The size of the smallest host egg that a wasp could theoretically parasitize can bedetermined from the wasps egg-laying behavior.

since the wasps somehow know how many eggs to lay in order for their larvae to survive, one can in theory compute the smallest size based on their egg-lay behavior ..

As you can see below - all the other choices can be eliminated with lot more certainity, leaving just "A"

B. Host insects lack any effective defenses against the form of predation practiced byparasitic wasps.

lack of effective defensive mechanism in the host - is out of scope

C. Parasitic wasps learn from experience how many eggs to lay into the eggs of differenthost species.
nothing in the argument talks about how the wasps know how many eggs to lay - hence out of scope

D. Failure to lay enough eggs would lead to the death of the developing wasp larvae morequickly than would laying too many eggs.

- the argument is not about which method will lead to the quicker end of the wasp larvae - so we cannot come to this conclusion that one method will lead to quick death than the other

E. Parasitic wasps use visual clues to calculate the size of a host egg.
- again, how the wasps know how many eggs to lay is out of scope

How the size can be determined from behavior?! in the passage we see they just know( based on instinct or experience, we don't know) but I cannot find correlation between choice A and passage

The argument tells us - "Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg"
So if the host egg is large in size, the wasp lays more eggs in it, but if it is smaller in size, the wasp lays fewer eggs inside it.
By observing their behaviour (how many eggs in which size host egg), we can extrapolate to find the size in which the wasp will, theoretically, lay only 1 egg. So any smaller than that and the wasp would lay no egg in it.

Oh, yes
Thank you for response Karishma

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Re: Parasitic wasps lay their eggs directly into the eggs of   [#permalink] 21 Oct 2017, 00:24

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