OG 11-1

Species are not compared 这句og有解释：From its opening sentence, this passage depends on a comparison between eusocial insect societies and naked mole rat colonies. Thus, the statement of the main idea must include both those species. B选项没有包含both those species

不过我不明白incorrect statement contradicts lines 23-27 为什么说contradict。

23-27行是Eusocial insect societies have rigid caste systems, each insect’s role being defined by its behavior, body shape, and physiology. In naked mole rat societies, on the other hand, differences in behavior are related primarily to reproductive status (reproduction being limited to the queen and a few males), body size, and perhaps age.

我觉得文中只是表明E和N在role的决定因素上有区别（划线部分才是对比的对象），并没有对比 rigid caste systems，也就是说，文中没有否定也没有肯定N是 rigid caste systems，只是说了下E是这样的systems。但是og解释中说contradict，非常迷惑，等待高人指点一下

谢谢你的解释噢。关于“contradict" 我是这样理解的。 “each insect’s role being defined by its behavior, body shape, and physiology ” 解释或者定义 “Eusocial insect societies have rigid caste systems”， 也就是说二者是相通的。on the other handy引出“E和N在role的决定因素上有区别”，也就是表明rat 没有"rigid caste system."