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Principle 1: Genetic Variation - In this setting, genetic variation is shown because there are long tongue frogs and short tongue frogs. The short tongue frogs are watching the long tongue frogs eat.
Principle 2: Overproduction and the struggle to survive - The frogs will always reproduce more than the environment can provide. Not all will survive.
Principle 3: Differential Survival and Reproduction - The short tongue frogs cannot reach the flies as easily as the long tongue frogs.
Principle 4: Changes in gene pool - Because the short tongue frogs cannot reach the flies they start to starve and eventually die.
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