份GRE考试阅读预测机经,第三弹-智课教育旗下智课教育.pdfVIP

智 课 网 G R E 备 考 资 料 2015年8月份GRE考试阅读预测机经，第三弹-智课教育 旗下智课教育 对于马上要参加GRE考试的考生来说，机经可谓是帮助考生获得高 分的有力保证，那么今天小编为考生分享2015年8月份GRE考试阅读预 测机经，第三弹，助战GRE考试。 想要在GRE考试中一举多得高分的考生，在复习中就避免不了使用 机经来帮助考生增加对GRE考试的了解，那么今天小编为考生友情分享 2015年8月份GRE考试阅读预测机经，第三弹，希望对考生有所帮助。 Biologists have long debated about whether egg production in birds is biologically highly costly, some theorizing that egg production is energetically or nutritionally demanding. Lack, however, suggested that clutch size--the number of eggs a bird lays per breeding cycle-- is far below the potential limit of egg production. He suggested that clutch size had instead evolved in relation to the number of young that the parents could successfully rear. Subsequently, most studies focused on limitations operating during chick rearing, particularly among altricial species (species in which the parents feed their young in the nest). Lack later recognized that in precocial species (species in which young feed themselves), clutch size might be explained by different factors -- the availability of food for egglaying females, for example. The passage suggests that biologists who say egg production in birds is biologically highly costly would agree that clutch size is determined primarily by A. The nutritional and energy demands of egg production. B. The number of young that the parents can rear successfully. C. Reproductive limitations operating during chick rearing. D. The availability of food for newly hatched chicks. E. The differences between altricial and precocial species. 参考答案：A. 参考第一句话。 Consider each of the choices separately and select all that apply. The passage suggests that Lack would agree with which of the following statements about factors affecting clutch size in birds? A. In altricial species, clutch size is determined primarily by factors operating after eggs are laid. B. In precocial species, c