MasterBooks

For most of history, biologists used the visible appearance of plants or animals to classify them. They grouped plants or animals with similar-looking features into families. Starting in the 1990s, biologists have extracted DNA and RNA from cells as a guide to how plants or animals should be grouped. Like visual structures, these reveal the underlying design or creation. Exploring the World of Biology is a fascinating look at life – from the smallest proteins and spores, to the complex life systems of humans and animals.