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Related Flashcards
Cards In This Set
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Evolution
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Change over time
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Theory
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A well-supported testable explanation of phenomena that have occurred in the natural world
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Fossil
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The preserved remains of ancient organisms
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Artificial selection
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Selection by humans for breeding of useful traits from the natural variation among different organisms
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Struggle for existence
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Members of each species compete regularly to obtain food, living space, and other necessities of life
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Fitness
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The ability of an individual to survive and reproduce in its specific environment
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Adaptation
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Any inherited characteristic that increases an organism's chance of survival
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Survival of the fittest
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Process by which individuals that are better suited
to their environment survive and reproduce most successfully
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Natural selection
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Process by which individuals that are better suited to their environment survive and reproduce most successfully
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Descent with modification
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Each living species has descended with changes from other species over time
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Common descent
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All species - living and extinct - were derived from common ancestors
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Homologous structure
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Structures that have different mature forms but develop from the same embryonic tissues
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Vestigial organ
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Organs that so reduce in size that they are just vestiges, or traces, of homologous organs in other species
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Gene pool
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All genes, including all the different alleles, that are present in a population
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Relative frequency
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The number of times the allele occurs in a gene pool compared with the number of times other alleles for the same gene occur
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