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Unformatted text preview: -members of different species do not usually mate with
Each other. If they do, the offspring are usually not
-reproductive isolation prevents gene flow and keeps
Cichlids??? Not clear cut. Other Species Concepts The morphological species concept
• Classifies organisms based on observable
phenotypic traits - used for both fossil and living
species… • The ecological species concept
• Defines a species by its ecological role or niche The phylogenetic species concept
• Defines a species as a set of organisms representing
a specific evolutionary lineage
specific Reproductive barriers keep species
separate Reproductive barriers serve to isolate a species'
gene pool and prevent interbreeding
• Prezygotic barriers prevent mating or fertilization
between Temporal isolation: Species breed at different
times Behavioral isolation: There is little or no sexual
attraction between species due to specific
behaviors Different species of
skunk can become
and remain separate
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This document was uploaded on 02/26/2014 for the course ENG 102 at Maryland.
- Spring '12