Parasitic wasps lay their eggs directly into the eggs : GMAT Critical Reasoning (CR)
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Parasitic wasps lay their eggs directly into the eggs

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Joined: 17 Jul 2008
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Parasitic wasps lay their eggs directly into the eggs [#permalink]

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17 Jul 2008, 14:02
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77. Parasitic wasps lay their eggs directly into the eggs various host insects in exactly the right numbers tor 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 theoretically 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.

Can anyone please explain the answer of that question?

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Re: CR- Parasitic wasps [#permalink]

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17 Jul 2008, 17:53
perfectstranger wrote:
77. Parasitic wasps lay their eggs directly into the eggs various host insects in exactly the right numbers tor 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 theoretically 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.

Can anyone please explain the answer of that question?

I think it's A. If you start with a relatively large eggs and then decrese their sizes, wasps will lay fewer and fewer eggs in each egg. At some point, wasps will stop laying any eggs because the host egg is too small.

B is incorrect because the passage doesn't say anything about defense. C and E are incorrect because the author doesn't say anything about HOW wasps determine the size of a host egg. D is incorrect because the passage doesn't provide any information to evaluate the argument.
Re: CR- Parasitic wasps   [#permalink] 17 Jul 2008, 17:53
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