Recent work in Metaphysics and in Philosophy of Science, and in particular in Philosophy of Biology, shows a revival of interest in issues that might be considered to be either metaphysical issues that can be further elucidated by recourse to biological cases or metaphysical consequences that some advancements in Biology have. In our talk, we will explore how the teleological discourse appears in Biology, and we will explore some ideas to test whether it is possible to argue for a particular kind of primitive and sui generis irreducibility of such teleological dimension. Our attempt will be based in comparison between some processes in development and cancer.