Upon discovery, the European explorers realized that all kinds of life are related in one way or another, and populations of organisms often have similarities to other populations in different areas, and the discovery of fossils throughout the world showed that the organisms of the past were different in varying levels from present day organisms, but that many of them seem related. While it used to be widely believed in European countries that life was fixed and unchanging, the discovery of other animals around the world led to the theory of evolution. From microevolution to macroevolution, change is happening to all the time. There are four forces of evolution- mutation, gene flow, genetic drift, and natural selection- all of which have an effect on all species undergoing adaptation. Evolution is a widely accepted theory of how species change over time. Some culture stories are based in creationism, and others are based in the science of evolution.
#Does gene flow increase or decrease variation free#
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