Variation, Differences in physical traits, behaviors, or physiological characteristics among individuals of the same species., Example of variation, Cats in a litter can be orange, white, both colors mixed or calico., Overproduction, Organisms produce more offspring than the environment can support., Example of Overproduction, Sea turtles lay hundreds of eggs in a single nesting season. Only a few hatchlings survive, Adaptation, Trait or characteristic that increases an organism's chances of survival and reproduction in a specific environment., Example of Adaptation, Polar bears have thick fur, a layer of fat, and white coloration, which help them survive in Arctic environments, Competition, Struggle between individuals for limited resources such as food, shelter, mates, or territory., Example of Competition, Lions & hyenas compete for zebras..

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