Ecological succession is the process of change in the species structure of an ecological community over time. The time scale can be decades, or even millions of years after a mass extinction
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In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. ... Evolution relies on there being genetic variation in a population which affects the physical characteristics (phenotype) of an organism.
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Eugleas create their own food through photosnthsis, the process of absorbing sunlight to synthesize foods from carbon dioxide and water. An eyespot at the front end of the euglena detects light I belive
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Purpose means is defined as to plan or intend to do something.
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Example is An example of purpose is people meeting to discuss how to cut costs within a company.
