How is evolution important in explaining the diversity of life?

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In any ecosystem, there is a wide variety of ecological niches.  These are areas and/or ways of life that can be exploited by different types of animals.  For example, in a rainforest, there are niches for animals that can climb to access fruit, but there are also niches for animals...

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In any ecosystem, there is a wide variety of ecological niches.  These are areas and/or ways of life that can be exploited by different types of animals.  For example, in a rainforest, there are niches for animals that can climb to access fruit, but there are also niches for animals that will eat fruit that has fallen to the forest floor.

Evolution is a process that allows species to become differentiated.  In this process, species gradually change in various ways.  The changes that are useful will be passed on to future generations and may eventually lead to the rise of new species.  It is in this way that evolution helps to explain the diversity of life.  The process of evolution allows new species to arise.  It allows species to come into existence and fill every niche in the ecosystem.  Because there are so many niches, this means that there are also going to be a wide variety of types of life.

Evolution, then, allows species to arise that are successful at filling various niches.  This leads to the existence of many diverse forms of life.

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