The phenomenon through which populations of organisms change over several generations is termed evolution.
Population is a group of similar organisms. These organisms are similar not only in terms of their appearances but also in their habitat, resources, their preferences and most importantly these organisms must be able to interbreed within them.
Evolution is the phenomenon of changes for better adaptations in the surroundings. Evolution is a very long-term process that may take several generations and millions of years for a small change to occur. the cause for evolution can be genetic or environmental or both.
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