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Evolution/History

QuestionAnswer
artificial selection selection by humans for breeding of useful traits from the natural variation among different organisms
fitness ability of an organism to survive and reproduce in its environment
adaptation inherited characteristic that increases an organism’s chance of survival
survival of the fittest process by which individuals that are better suited to their environment survive and reproduce most successfully
natural selection process by which individuals that are better suited to their environment survive and reproduce most successfully
genetic drift random change in allele frequencies that occurs in small populations
reproductive isolation separation of species or populations so they cannot interbreed and produce fertile offspring
behavioral isolation form of reproductive isolation in which two populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
geographic isolation form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water
temporal isolation form of reproductive isolation in which two populations reproduce at different times
relative dative method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock
index fossil distinctive fossil used to compare the relative ages of fossils
radioactive dating technique in which scientists calculate the age of a sample based upon the amount of remaining isotopes it contains
homologous structure structures that have different mature forms in different organisms but develop from the same embryonic tissues
vestigial organ organ that serves no useful function in an organism
gene pool combined genetic information of all the members of a particular population
relative frequency number of times an allele occurs in a gene pool compared with the number of times other alleles occur
Created by: Batterbee
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