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Principle #1 Genetic variation: The genetic variation between the two snakes is that the brown one blends in to the sand and the red ones are easily spotted by predators.
Principle #2 Overproduction & the struggle for existence:Female snakes have 2 babies but at least one survies.The red snake can't blend in to the sand an get eaten by birds.
Principle #3 Differential survival & Reproduction:The brown snake has a higher fitness and therefor will reproduce.
ePrinciple #4 Change in the gene pool:The change in the gene pool is the brown snake was able to camoflouge and hide from the predetors
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