So, for instance, leaves of a certain shape are more suited to life in the desert, where there is plenty of light but little water, while differently shaped leaves are better adapted to life on the floor of the rain forest, where water is abundant but light is scarce. In other words, these characteristics affect the two things that really matter—biologically speaking—for any living being on the planet: its survival and, even more crucially, its ability to reproduce. Finally, there is a correlation between the characteristics of parents and
