The Fuzziness of Biological Definitions
Physics has fundamental forces as its core. Chemistry has its elements. And the fundamental unit of biology is the species. In this regard it's been likened to stamp collecting. A more modern analogy might be to Pokemon - gotta catch em all! Like chemists studying elements, once we know the different species we can work out how they interact with each other and how they work. And in so doing we can learn about our natural world. Fun stuff! But what actually is a species? What is a Species? You probably learned the "biological species" definition at school. This definition states that: species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups (Mayr, 1942) This is an often-used definition, which is why you learn it in school, but there are problems with it. For one thing, there are species that are parthenogenetic , meaning they don't breed but reproduce asexually, with the egg developing