BI111 Study Guide - Parapatric Speciation, Sympatric Speciation, Allopatric Speciation

67 views3 pages
20 Apr 2013
School
Department
Course
Professor

Document Summary

Biological species concept: the definition of species based on the ability of populations to interbreed and produce fertile offspring. What about androdioecous organisms (all males) and gynogenetic organisms (all female) Phylogenetic species concept: defines a species as a group of organisms bound by a unique ancestry. Ecological species concept: defines a species as group of organisms that share a distinct ecological niche (occupy the same location with the same resources) Morphological species concept: is the idea that all individuals of a species share measureable traits that distinguish them from individuals of other species. Ring species: some plants and animals have ring shaped geographic distribution that surround uninhabitable terrain. Adjacent species of these ring species can exchange genetic material directly, but gene flow between distant populations occurs only through intermediary populations. Clinal (cline) variation: a pattern of smooth variation along the geographic gradient. Usually results from gene flow between populations you can see the evolution along a line .

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers

Related Documents