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Definition
| change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift |
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Definition
| any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment |
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| Descent with Modification |
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Definition
| the passing on of traits from parent organisms to their offspring |
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Definition
| the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations. |
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| any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc |
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| The totality of fossilized artifacts and their placement within the earth's rock strata. It provides information about the history of life on earth, for instance what the organisms look like, where and when they live, how they evolved, etc. |
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| no longer in existence; that has ended or died out: an extinct species of fish |
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| Structures derived from a common ancestor or same evolutionary or developmental origin |
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| refers to an organ or part (for example, the human appendix) which is greatly reduced from the original ancestral form and is no longer functional or is of reduced or altered function |
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| the total number of persons inhabiting a country, city, or any district or area |
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| the total number of persons inhabiting a country, city, or any district or area |
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| a process in the breeding of animals and in the cultivation of plants by which the breeder chooses to perpetuate only those forms having certain desirable inheritable characteristics |
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| the total genetic information in the gametes of all the individuals in a population |
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| evolutionary change involving the gradual accumulation of mutations leading to new varieties within a species |
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| Hardy-Weinberg Equilibrium |
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Definition
| states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. |
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Definition
| random changes in the frequency of alleles in a gene pool, usually of small populations. |
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| the alteration of the frequencies of alleles of particular genes in a population, resulting from interbreeding with organisms from another population having different frequencies. |
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| the genetic contribution of an individual to the next generation's gene pool relative to the average for the population, usually measured by the number of offspring or close kin that survive to reproductive age. |
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Definition
| any of a large group of chemical substances, as penicillin or streptomycin, produced by various microorganisms and fungi, having the capacity in dilute solutions to inhibit the growth of or to destroy bacteria and other microorganisms, used chiefly in the treatment of infectious diseases. |
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