Key Concepts in Evolutionary Biology

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Scientific Theory

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A scientific explanation of the natural world that can be tested by experiments and observations.

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Jean-Baptiste Lamarck

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Suggested that organisms could change during their lifetimes by using or not using parts of their bodies

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Darwin's Patterns of Diversity

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1) Species vary globally,

2) Species vary locally,

3) Species vary over time

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Artificial Selection

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A process where humans select plant and animal traits they find useful

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Adaptation

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The ability of a species to change with its environment

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Biological Fitness

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How well an organism can survive and reproduce in its environment

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Natural Selection

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Organisms with traits best suited to their local environment survive and leave more offspring.

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Descendants

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Parents who have survived and reproduced in their environment