Test 1 Notes - Speciation

Test 1 Notes - Speciation - The Origin of Species...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
The Origin of Species Principles of Biology II Georgia Southern University Leege Speciation, the origin of new species, is at the focal point of evolutionary theory Evolutionary theory must explain how new species originate and how populations evolve Microevolution consists of adaptations that evolve within a population, confined to one gene pool Macroevolution refers to evolutionary change above the species level Two basic patterns of evolutionary change: Anagenesis (phyletic evolution) transforms one species into another Cladogenesis (branching evolution) is the splitting of a gene pool, giving rise to one or more new species Concept 24.1: The biological species concept emphasizes reproductive isolation Species is a Latin word meaning "kind" or "appearance" The Biological Species Concept Members of a biological species are reproductively compatible, at least potentially; they cannot interbreed with other populations. Reproductive Isolation Biological factors (barriers) that impede two species from producing viable, fertile hybrids
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/21/2008 for the course BIOL 2108 taught by Professor Leege,gleason during the Spring '08 term at Georgia Southern University .

Page1 / 3

Test 1 Notes - Speciation - The Origin of Species...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online