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21 Cards in this Set
- Front
- Back
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survival of the fittest
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Organisms adapted to their environment through natural selection. The best suited organisms survive to pass on their genes
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Adaptation
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Inherited modification of structure or function that allows an organism to survive and reproduce in its environment
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Comparative embryology
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The comparison of the early stages of development between different species
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Comparative genetics
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The study of similarities and differences in the DNA sequence of different species
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Comparative anatomy
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The study of similarities and differences and anatomy between different species
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Analogous structure
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Body parts and different species that have the same appearance or function but are not the result of common descent
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Biogeography
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The study of the past and present geographic distribution of species found throughout the world.
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Decent with modification
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evolution; the idea that organisms change over time through modification from an ancient ancestor.
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fossil
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The preserved remains or traces of an ancient organism
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Allele frequency
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The number of times a particular allele occurs in a gene pool compared to the total number of alleles for that particular gene
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Variation
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Difference between individuals in a population
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Artificial selection
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The process of breeding only livestock or crops with desirable characteristics in order to increase the frequency of those characteristics in the offspring
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Extinct
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A species with no surviving members
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Gene pool
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The total number of genes including all the different alleles for those genes present in a population at particular times
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Vestigial structure
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Homologous structures that have lost most or all of their original function
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Homologous structure
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Body part in different species that may not serve the same function but have a similar structure due to common descent
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Evolution
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Process by which organisms develop over time for modification from an ancient ancestor
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Polygenic trait
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A trait that is good more than one gene
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Principle of common descent
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The idea that all organisms share an ancient common ancestor
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Natural selection
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a non-random mechanism of evolution in which the fittest organisms survive and leave the most offspring
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Single-gene trait
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A trait that is controlled by single gene
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