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Evolution
Chapters 28 and 29
13
Biology
9th Grade
05/25/2011

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Term
Adaptive Radiation
Definition
Process by which a single species or a group of species evolves into several different forms that kive in different ways.
Term
Behavioral Adaptation
Definition
How an animals acts and behaves in order to stay alive due to its climate.
Term
Convergent Evolution
Definition
Process by which unrelated organisms independently evolve similarities when adapting to similar environments.
Term
Divergent Evolution
Definition
The process by which a species evolves into two or more descendant or different forms.
Term
Genetic Drift
Definition
Random change in allele frequency caused by a series of chance occurences that cause an allele to become more or less common in a population.
Term
Geographic Isolation
Definition
Form of reproductive isolation in which two populations are sparated by geographic barriers such as rivers, mountains, or bodies of water, leading to the formation of two separate species.
Term
Gradualism
Definition
The evolution of a species by gradual accumulation of small genetic changes over long periods of time.
Term
Physiological Adaptation
Definition
A metabolic or physiologic adjustment within the cell, or tissues, of an organism in response to an environmental stimulus resulting in the improved ability of that organism to cope with its changing environment.
Term
Punctuated Equilibrium
Definition
Pattern of evolution in which long stable periods are interrupted by breif periods of more rapid change.
Term
Reproductive Isolation
Definition
Separation of a species or population so that they no longer interbreed and evolve into two separate species.
Term
Speciation
Definition
Formation of a new species.
Term
Species
Definition
A group of similar oeganisms that can breed and produce fertile offspring.
Term
Structural Adaptation
Definition
When an animal or a living thing is adapted to its enviroment by the way it's body is built.
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