Describe three instances of possible evolutionary mechanisms observed in the natural world which allowed the organism to more successfully survive and reproduce. Include the environmental factors that induced those changes.

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stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

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b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.