Randomness.
the fitest survive
Overproduction
Artificial Selection, Sexual Selection and Natural Selection.
Variations within a population
Natural Selection :)
Natural selection.
Variation in the organisms under selection. In both artificial selection and natural selection there must be heritable variations that have the possibility of being in the case of artificial selection what the selector wants in the organism and in thje case of natural selection survivability and reproductive advantages.
natural selection
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It shows natural selection by showing how different birds have adapted over time to continue living, and the birds which didn't adapt, went extinct.
The common factor in the three types are that dominant traits are preferred.