Darwin proposed that individual s with friendly traits atomic number 18 more likely to defy and reproduce. Darwin called this process natural selection. Darwin did not understand how or why variation existed. immediately scientists realize that variation arises through ergodic changes (called mutations) to existing genes. Genes are the chemicals that determine the traits and characteristics of animals and plants. Every tra...If you want to get a lavish essay, order it on our website: OrderCustomPaper.com
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