bio1012
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exam 1
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8 Terms
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WHAT IS EVOLUTION?
Evolution means that a population’s genes change over generations.
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NATURAL SELECTION
Natural selection is not random. It happens when certain traits help organisms survive and reproduce better.
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Variation
Individuals are different (size, color, speed, beak shape).
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Inheritance
Some traits are passed from parents to offspring.
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Competition
More offspring are produced than the environment can support.
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FITNESS
How successful an organism is at reproducing, not how strong or fast it is.
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finch
Darwin’s finches show evolution by natural selection because finches with beak shapes best suited to available food survived and reproduced more, causing the population to change over generations.
Note 
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