10-3 Theory of Natural Selection – Flashcards
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Artificial selection
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The Process in which Humans change a species by breeding it for certain traits.
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Heritability
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The ability of a trait to be passed down from one generation to the next.
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Natural Selection
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A mechanism by which individuals that have inherited beneficial adaptions produce more offsprings on average than other individuals.
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Population
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All individuals of a species that live in an area.
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Fitness
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The measure of the ability to survive and produce more offsprings.
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Explain Overproduction
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An organism may produce many offsprings, however, not all will survive due to competition for resources.
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Explain Variation
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Some organisms may be born with slightly larger jaws and teeth due to natural variation in the population, some are inheritable.
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Explain Adaptation
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Organisms with corresponding attributes with the environment will survive longer than those who do not.
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Explain Descent with Modification
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Certain aspects may be inheritable therefore more common in the population.
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What did Darwin hope to learn about Natural selection by studying pigeons?
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He wanted to learn whether you can possibly change the whole species following.
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What are the four principles of natural selection?
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Overproduction, Variation, Adaptation, and Descent with modification.
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Why must there be variation in the population in order for for natural selection to occur?
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If there is no variation, there is no survival of the fittest. if all organisms are the same, it makes no difference which ones are killed.
