The real affinities of all organic beings, in contradistinction to their adaptive resemblances, are due to inheritance or community of descent. 查尔斯·达尔文.物种起源.
We can understand, on the above views, the very important distinction between real affinities and analogical or adaptive resemblances. 查尔斯·达尔文.物种起源.
We are least likely in the modifications of these organs to mistake a merely adaptive for an essential character. 查尔斯·达尔文.物种起源.