Parasitic wasps lay their eggs directly into the egg 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 og the host egg would decay, killing the wasp larvae. Which of the following conclusion can properly be drawn from the information above? 答案是 (A) The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior. 能讲讲为什么吗?
Parasitic wasps lay their eggs directly into the egg of various host insects in exactly the right numbers for any suitable size of host egg. (陈述一个客观存在的事实, 也是本文作者的观点)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 og the host egg would decay, killing the wasp larvae. (这两句话都是在解释上面的一个事实, 更具体的说就是"exactly the right numbers for any suitable size ", 为什么要在大小合适的..上面产正确地数目的卵, 多了不行少了也不行) 当你已经弄清楚题目的意思, 问题是conclusion就迎刃而解了: A选项: 最小的寄生卵可以通过黄蜂产卵的数目决定, 这就是exactly the right numbers for any suitable size 的一种变体.