BIOL 1141 Chapter Notes - Chapter 17: Chromosome, Polyploid, Species Problem
24 Apr 2017
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Document Summary
Macroevolution: large-scale evolutionary change, such as the formation of new species. Taxonomist: scientist that investigates the identification and naming of new organisms. Morphology: physical characteristics that contribute to the appearance of an organism. Morphological species concept: definition of a species that defines species by specific diagnostic traits. Diagnostic traits: characteristics that distinguish species from one another. Cryptic species: species that are very familiar in appearance but are considered separate species based on other characteristics, such as behavior or genetics. Evolutionary species concept: every species has its own evolutionary history, which is partly documented in the fossil record. Phylogenetic species concept: definition of a species that is determined by analysis of a phylogenetic tree to determine a common ancestor. Monophyletic: group of species including the most recent common ancestor and all its descendants. Biological species concept: the concept that defines species as groups of populations that have the potential to interbreed and that are reproductively isolated from other groups.
