Natural Selection and Adaptation Preserve Life Forms, Rather Than Generate New Ones
Plants and animals were originally created with large gene pools within created kinds. A large gene pool gives a created kind the genetic potential (the potential to produce a variety of types within a kind) to adapt to a variety of ecosystems and ensure the survival of that kind of organism through natural selection.
Genetic potential can best be understood by observing the large number of dog breeds. There are many shapes, sizes, and colors of dogs, illustrating the tremendous genetic potential in this kind of animal. Other kinds of plants and animals have similar potential to produce variety within a created kind.
Natural selection can only operate on the genetic material already present in a population of organisms. It cannot create new genetic information and subsequently change one kind of organism into another.