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Definition
| Descent with modification |
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Definition
| A preserved remnant or impression of an organism that lived in the past |
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Definition
| A rock layer formed when new layers formed when new layers of sediment cover older ones and compresses them. |
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| The scientific study of fossils |
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Definition
| The principle that events in the past occured suddenly and were caused by different mechanisms |
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Definition
| Inherited characteristics of an organism that enhances its survival and reproduction in specific environments |
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Definition
| A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are organisms with other characteristics |
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Definition
| The selective breeding of domesticated plants and animals to encourage the occurrence of desirable traits |
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Definition
| Similarity in characteristics resulting from a shared ancestry |
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Definition
| Structures in different species that similar because of common ancestry |
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Definition
| A structure of marginal, if any, importance to an organism |
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Definition
| A branching diagram that reflects a hypothesis about evolutionary relationships among groups of organisms |
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Definition
| The evolution of similar features in independent evolutionary lineages |
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Definition
| The study of the past and present distribution of species. |
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Definition
| The slow movement of the continental plates across earth's surface |
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Definition
| The super continent that formed near the end of Paleozoic era, when plate movements brought all the land masses of earth together |
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Definition
| Referring to a species that is confined to a specific, relatively small geographic area |
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Definition
| Evolutionary change below species level, change in the allele frequencies in a population over generations |
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Term
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Definition
| The % on average of a populations loci that are heterozygous in members of the population |
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Term
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Definition
| Differences between gene pools of geographically separate populations of population subgroups |
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Term
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Definition
| A graded change in a character along geographic axis |
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Term
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Definition
| A Change in the nucleotide sequence of an organisms DNA, ultimately creating genetic diversity |
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Definition
| A localized group of individuals of the same species that can interbreed, producing fertile offspring. |
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Definition
| The aggregate of all the alleles for all of the loci in all individuals in a population |
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Term
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Definition
| The principle that frequencies of alleles and genotypes in a population remain constant from generation to generation, provided that only Medelian segregatoin and recomvination of alleles are at work. |
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Term
| Hardy-Weinberg Equilibrium |
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Definition
| The condition describing a nonevolving population |
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Term
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Definition
| A process in which change events cause unpredictable fluctuations in allele frequencies from one generation to the next |
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Term
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Definition
| Genetic drift that occurs when the size of a population is reduced, as by a natural disaster or human actions. |
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Term
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Definition
| The transfer of alleles from one population of another, resulting from one movement of fertile individuals or their gametes |
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Term
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Definition
| The contribution an individual makes to the gene pool of the next generation, relative to the contributions of other individuals in the population |
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Term
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Definition
| Natural Selection in which individuals at one end of the phenotypic range survive or reproduce more successfully than do other individuals |
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Term
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Definition
| Natural Selection in which intermediate phenotypes survive or reproduce more successfully than do extreme phenotypes |
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Term
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Definition
| Natural selection in which individuals on both extremes of a phenotypic range survive or reproduce more successfully than do individuals with intermediate phenotypes |
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Term
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Definition
| A form of natural selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates |
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Term
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Definition
| Marked differences between the secondary sex characteristics of males and females |
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Term
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Definition
| A direct competition among individuals of one sex for mates of the opposite sex |
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Term
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Definition
| Selection whereby individuals of one sex are choosy in selecting their mates from individuals of the other sex. |
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Term
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Definition
| Natural Selection that maintains two or more phenotypic forms in a population |
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Term
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Definition
| Greater reproductive success of heterozygous individuals compared with homozygotes |
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Term
| Frequency-Dependent Selection |
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Definition
| A decline in the reproductive success of individuals that have a phenotype that has become too common in a population |
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Term
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Definition
| Genetic variation that does not appear to provide a selective advantage or disadvantage |
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Term
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Definition
| Having two haploid sets of homologous chromosomes |
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