The compact Toyota Corolla has continually been one of the worldâs best-selling cars. This Asian compact sedan hit the American market in 1969, and 2007 models are still being produced. Reliability, fuel economy, as well as its low purchase price give this compact the edge over the competition.
The premise of Darwin's theory of evolution by natural selection is that all life, from mammals to single celled organisms, is related through descent with modification from common ancestral stock. The mechanism he proposed to explain descent with modification was natural selection.he premise of Darwin's theory of evolution by natural selection is that all life, from mammals to single celled organisms, is related through descent with modification from common ancestral stock. The mechanism he proposed to explain descent with modification was natural selection.
Darwin's Theory. In 1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. He defined natural selection as the principle by which each slight variation [of a trait], if useful, is preserved.n a letter to Charles Lyell in September 1860, Darwin regretted the use of the term Natural Selection, preferring the term Natural Preservation. For Darwin and his contemporaries, natural selection was in essence synonymous with evolution by natural selection.