Faith is at the heart of any belief system which fits a particular worldview, whether it be a Creator designed world or one that was produced as a result of a multi-billion year game of evolutionary solitaire. Now there's no doubt that animals adapt to their environment and that such adaptation can be favorable in the genetic lottery but the full scope of earth's biological diversity was not produced as a result of a genetic lottery that is the equivalent of putting a billion monkeys in a room with a billion typewriters and waiting a billion years until they produce Shakespeare.