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Parasitic wasps lay their eggs directly into the eggs of [#permalink]
14 Mar 2006, 19:48
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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.
(A) Can't tell from the passage
(B) Best choice. It appears the larvae will only die when the wasp makes a wrong decision when it is laying eggs. We can conclude that as long as the right amont of eggs are laid, the host larvae will have no chance
(C) Can't draw from the passage
(D) Can't draw from the passage
(E) Can't tell from the passage
B) Host insects lack any effective defenses against the form of predation practiced by parasitic wasps. ---> There is nothing we can extract from the argument that the host insects need protection against parasitic wasp predation. So this is out of subject.
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