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Darwin's observations & inferences
Campbell Ch 22
Members of a population often vary greatly in their traits
Traits are inherited from parents to offspring
All species can produce more offspring than the enviro can support
Due to lack of resources, many of these offspring don't survive
Individuals whose inherited traits
give them a higher probability of surviving n reproducing in a given enviro tend to leave more offspring
un= ability of individuals 2 survive n reprod -> accumulation of favorable traits in the population over gens