A population of Sharks is evolving towards the average body size; small sharks fall prey to killer whales, large sharks can't get enough food A population of daisies is evolving away from pink individuals and towards white and red individuals. Pink flowers blend in whereas white or red can more easily be spotted by bees population of snakes is evolving to become browner since lighter colored snakes are mor easily spotted by predators

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Niche Conservatism

The term niche in ecology refers to the role that an organism plays in a community. The physical and environmental conditions that a species requires, as well as the interactions it has with other species, comprise a species niche like predation or competition.