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Chp. 16, Section 3

Vocab for 16.3 Biology

TermDefinition
Allopatric speciation Species arising as a result of geographic isolation; "different homelands"
Biological species concept The concept that a species is a population of organisms that can interbreed but cannot breed with other populations
Geographic isolation The physical separation of populations due to geographic barriers that prevent interbreeding
Gradualism A model of evolution in which gradual change over a long period of time leads to biological diversity
Morphology The study of the structure and form of an organism
Postzygotic isolation A type of reproductive isolation that occurs after fertilization
Prezygotic isolation A type of reproductive isolation that occurs before fertilization
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
Reproductive isolation The inability of members of a population to successfully interbreed with members of another population of the same or a related species
Speciation The formation of new species as a result of evolution
Sympatric speciation Occurs when two subpopulations are reproductively isolated within the same geographic area
Created by: CareGraceR
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