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# Parasitic wasps lay their eggs directly into the eggs of

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Senior Manager
Joined: 11 Feb 2007
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Parasitic wasps lay their eggs directly into the eggs of [#permalink]

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11 Mar 2007, 21:46
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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 theoretically parasitize can be determined from the waspâ€™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.

Tricky?

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Manager
Joined: 09 Jan 2007
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11 Mar 2007, 22:00
I would pick (C).

Though I am not sure about the phrase 'learn from experience '

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Director
Joined: 13 Dec 2006
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11 Mar 2007, 22:22
I will go with B... its a good question, curious to know that answer

regards,

Amardeep

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Manager
Joined: 22 Feb 2007
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11 Mar 2007, 22:36
According to me, it is A.
Since the wasps lay exactly the right nos of eggs - not too less, not too more - based on the no of eggs laid, we can determine the size of the host egg.
Small size of host egg would be the one in which parasite lays just 1 egg.

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Director
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11 Mar 2007, 22:40
Chose A.

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VP
Joined: 21 Mar 2006
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12 Mar 2007, 01:59
I nearly killed myself trying to figure out this one.... I've given the GMAT and IMO I've done pretty well. Yet theexplanation to this one eludes me. I know what the OA is. Would anyone care to explain it to me?

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Senior Manager
Joined: 27 Jul 2006
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12 Mar 2007, 10:50
Lets look at this question closely

(A) The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the waspâ€™s egg-laying behavior. we have been told that wasps lay the right amount of eggs in the right size eggs. We could assume that if they do not put any eggs into a host egg that it is too small, too large, or the wrong kind of egg

(B) Host insects lack any effective defenses against the form of predation practiced by parasitic wasps. We are not given any information about host insects, outside of the scope

(C) Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species. No information about how they determine how many eggs.

(D) Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.
Also outside of the scope, we have no information about speed.

(E) Parasitic wasps use visual clues to calculate the size of a host egg. Again there is no information about how an egg's size is calculated.

From this list the only one that seems to work logically is A

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Senior Manager
Joined: 11 Feb 2007
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12 Mar 2007, 21:40
The OA is A.

I thought it was C.

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Senior Manager
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12 Mar 2007, 21:42
kripalkavi wrote:
I nearly killed myself trying to figure out this one.... I've given the GMAT and IMO I've done pretty well. Yet theexplanation to this one eludes me. I know what the OA is. Would anyone care to explain it to me?

Off topic but, kripalkavi, what is IMO?

I've seen ppl saying IMO but don't know what it means...

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12 Mar 2007, 21:42
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# Parasitic wasps lay their eggs directly into the eggs of

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