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biology 16.3 terms

speciation the formation of new species as a result of evolution
morphology the study of the structure and form of an organism
biological species concept the principle that defines a species as a group of organisms whose members can interbreed to produce offspring
geographic isolation the physical separation of populations due to geographic barriers that prevent interbreeding
allopatric speciation happens when species arise as a result of geographic isolation.
reproductive isolation the inability of members of a population to successfully interbreed with members of another population of the same or a related species
prezygotic isolation occurs before fertilization
postzygotic isolation occurs after fertilization
sympatric speciation occurs when two sub populations become reproductively isolated within the same geographic area.
gradualism a model of evolution in which gradual change over a long period of time leads to biological diversity
punctuated equilibrium a model of evolution in which short periods of drastic change in species, including mass extinctions and rapid speciation, are separated by long periods of little or no change
Created by: eifertmaddy15