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题库 / Prep2007E1-CR-48
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?
The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.
Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.
Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.
Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.
Parasitic wasps use visual clues to calculate the size of a host egg.
寄生蜂将卵产在宿主昆虫的卵里，且寄生蜂卵恰好能适应宿主卵的大小。若在一个宿主昆虫卵中产太多寄生蜂卵，寄生蜂幼虫会争食物和空间；若在一个宿主昆虫卵中产太少寄生蜂卵，宿主昆虫卵会衰败，让寄生蜂幼虫死亡。
结论题
A 从寄生蜂的产卵行为可以推断理论上可以用于寄生的最小的宿主昆虫卵的大小；符合逻辑链，正确
B 宿主昆虫对寄生蜂的行为缺乏有效防御；没提及，跳出范畴，排
C 寄生蜂是从经验得出应该产多少寄生蜂卵的；从经验来，跳出范畴，排
D 产不够寄生蜂卵比产太多寄生蜂卵更容易导致寄生蜂幼虫死亡；文中只提到产太多和产太少各自有什么后果，但没有提到那种情况寄生蜂幼虫更容易死亡，跳出范畴，排
E 寄生蜂是从视觉线索判断宿主卵的大小的；视觉线索，跳出范畴，排
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