Darwin proposed that individuals with hearty traits atomic number 18 to a greater extent likely to survive and reproduce. Darwin called this plow natural selection. Darwin did not understand how or why variableness existed. nowadays scientists realize that variation arises through random changes (called mutations) to vivacious genes. Genes are the chemicals that determine the traits and characteristics of animals and plants. Every trait has one or more g...If you want to get a full essay, piece it on our website: BestEssayCheap.com
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