A variance is an exception to one or more of the zoning restrictions on a piece of property. A variance is different from a nonconforming use, which permits existing structures and uses to continue when zoning is first instituted.
The book, On The Origin Of Species,  suggested  that organisms evolve through the process of natural selection.opulations evolve as the individual organisms less able to survive in the current environment die and fail to reproduce. That is natural selection.
Charles Darwinâs theory of evolution, as taught at school, is a biological explanation of how creatures have supposedly âevolvedâ or developed progressively through natural selection and variation (now known as mutation) over eons of time from the tiny cell to the largest creatures on earth today.