Chapters 24

Chapters 24 - CHAPTER 24 THE ORIGIN OF SPECIES Species...

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

View Full Document Right Arrow Icon

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

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

Unformatted text preview: CHAPTER 24 THE ORIGIN OF SPECIES Species: Latin for “kind” or “appearance” Biological Species Concept • Defines a species as a population or group of population of populations whose members have the potential to interbreed in nature to produce viable, fertile offspring • Cannot be applied to o Asexual organisms o Fossils o Organisms about which is little is known regarding their reproduction Speciation Dependent on o Reproductive isolation o Genetic divergence o Isolated population diverges – if they come back together, they can no longer reproduce Reproductive Isolation • The existence of biological factors that impede members of two species from producing viable, fertile offspring o Prezygotic barriers- prevent zygote forming – keep gametes from coming together -- Ex (does not mate) :- (Habitat Isolation) species living in the same place but different habitats- (Temperoal) different breeding time of the year - (Behavioral Isolation) different behaviors – behaviors are unique to a different species. – enable mate - (Behavioral Isolation) different behaviors – behaviors are unique to a different species....
View Full Document

This note was uploaded on 03/18/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

Page1 / 2

Chapters 24 - CHAPTER 24 THE ORIGIN OF SPECIES 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