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| Inherited characteristic of a species that develops over time in response to an environmental factor, enabling the species to survive. |
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| Number of different species living in a specific area. |
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| Taxonomic method that models evolutionary relationships based on shared derived characters and phylogenic trees. |
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| Geologic theory that the relative positions of the continents on the Earth's surface have changed considerable through geologic time. |
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| The number and variety of species present in an area and their spacial distribution. |
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| The study of the embryo and its development from a single-celled zygote. |
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| Includes everything that is used to reveal and determine the truth. |
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| The change in the inherited characteristics of biological populations over successive generations. |
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| The disappearance of a species when the last of its members dies. |
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| Preserved evidence of an organism, often found in sedimentary rock, that provides evidence of past life. |
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| Random change in allelic frequencies in a population. |
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| Physical movement of alleles from one population to another. |
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| Primitive that walks upright, has long lower limbs, thumbs that oppose the other four fingers, and a relatively large brain. |
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| Anatomically similar structure inherited from a common ancestor; different function, same structure. |
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| Assumption based on prior experience. |
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| Permanent change in a cell's DNA, ranging from changes in a single base pair to deletions of large sections of chromosomes. |
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| The product of reproduction of a new organism. |
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| Orderly, direct information gathering about a natural phenomenon. |
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| Evolutionary history of a species. |
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| Group of organisms of the same species that occupy the same geographic place at the same time. |
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| Final stage in speciation, in which members of isolated populations are either no longer able to mate or no longer able to produce viable offspring. |
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| Group of organisms that an interbreed and produce fertile offspring. |
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| Theory of evolution developed by Darwin, based on four ideas: Excess reproduction, variations, inheritance, and the advantages of specific traits in a natural environment. |
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| Explanation of a natural phenomenon based on many observations and investigations over time. |
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| Evolution of two or more species from one ancestral species. |
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| Different structure, same function |
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| Differences in physical traits of an individual from the group to which it belongs. |
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| Reduced form of a functional structure that indicated shared ancestry. |
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| Evolution toward similar characteristics in unrelated species, resulting from adaptions to similar environmental conditions. |
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| Evolution of one or more closely related species into different species; resulting from adaptions to different environment conditions. |
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