By and large, the features observed in animals, plants, fungi,
and biological organisms, in particular, are representative of
their function and shaped by natural selection in the context of
their environment. When we, as scientists, observe forms in nature,
such as differing limb structures in vertebrates, varying tooth
shapes in mammals, a diversity of leaf shapes in trees, or even the
different shapes and sizes of cell types, we see both the function
of the trait in question as well...