13 EVOLUTIONARY BIOLOGY TERMS TO KNOW

Created by maroconnor 

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13 terms · From the DemiDec 2008 Super Quiz Cram Kit

Adaptive radiation

divergence of a common ancestor in a new environment

Allopatry

geographic seperation of species

Balancing selection

favors heterozygous organisms

Direct fitness

number of its own alleles that an organism passes to the next generation through reproduction

Directional selection

favors traits at one end of spectrum

Disruptive selection

favorts traits at both ends of spectrum

Exaptation

trait that has changed in purpose over time

Horizontal transfer

genetic transfer between different species

Indirect fitness

number of alleles identical to its own that an organism's relatives contribute to the next generation due to the organism's help

Macroevolution

affects entire species

Microevolutions

affects populations

Stabilizing selection

favors intermediate traits

Sympatry

ecological seperation and geographic unification of species

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