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.
Concept 22.2 In The Origin of Species, Darwin proposed that species change through natural selection. 1  Charles Darwin (1809â1882) was born in western England. 2  Darwin left Edinburgh without a degree and enrolled at Cambridge University with the intent of becoming a clergyman. 3  Darwin received his B.A. in 1831.