Evolution Drives The Diversity And Unity Of Life

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Big Idea 1- The process of evolution drives the diversity and unity of life

Natural selection is evolutions driving mechanism. Evolution is “the process by which different kinds of living organisms are thought to have developed and diversified from early forms during the history of the earth.” Darwin 's theory states that inheritable variations exist within individuals in a population. This big idea has impacted human life and evolution in many ways. With natural selection as its major mechanism, according to Darwin’s theory, competition for limited resources results in differential survival. People with more favorable phenotypes are more likely to survive and reproduce, which passes their traits onto future generations. This big idea relates to the other big ideas because you need to transmit the important information, as in genes and traits that an organism will pass on to future generations so that they can eventually evolve. This is the process of natural selection.
Alteration in the gene pools of populations can be caused by naturally occurring catastrophic or human induced events. It can also be caused by random environmental changes. In order for species to survive, they need a diverse gene pool because environmental changes can readily change. Species may not be able to survive in new environmental changes without a diverse gene pool and phenotype diversity. Sources of genetic variation can provide new genes and combinations of alleles that grant new phenotypes.

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