In the "Critique of the Teleological Power of Judgment", Kant claims that in the realm of living nature we encounter phenomena that appear to display a peculiar purposiveness. The wings of a bird, for example, seem to be conducive to the bird's capacity to fly and thereby to the survival of the bird as a whole. The whole organism, moreover, appears to be the result of an end-directed developmental process. Some natural objects, namely the living organisms, thus appear to us as if they were characterized by a purposive organization of the whole and its parts, and by a particular end-directedness. In order to account for this, Kant introduces the concept of biological purposiveness, that is, an objective, material, and internal purposiveness. 1 1 In §61 of the CPJ, Kant introduces the concept of objective purposiveness as the third of three types of the purposiveness of nature. The first is the subjective purposiveness of nature as a whole for its "comprehensibility" by the human intellect (CPJ V 359.4 f.