1. ORIGIN OF SPECIES Chapter 24 2. Speciation• Speciation - Origin ofnew species• Two models:– Anagenesis– Cladogenesis• Micro v. Macro evolution– Micro – changes…

Slide 1 Slide 2 Speciation Slide 3 How many species are there? All organismsJust animals In short, an awful lot! Slide 4 What is a species? Species – The members of a group…

Slide 1 IV. The Process of Evolution A. Two types of evolution 1. Macroevolution – any change of a species over time into another. Any changes or “long-term” trends…

Slide 1 BIOE 109 Summer 2009 Lecture 11-Part II Speciation Slide 2 What is speciation? Slide 3 What is speciation? in Darwin’s words, speciation is the “multiplication…

Slide 1 Slide 2 Speciation I.Microevolution and macroevolution II.Patterns of descent III.Species concepts A.Biological species B.Ecological species C.Morphological species…

Slide 1 Chapter 24 The Origin of Species (cont.) Slide 2 Questions to ponder Natural hybridization is common and hybrids are not uniformly unfit, they are genotypic classes…

Slide 1 Figure 24.0 A Galápagos Islands tortoise Slide 2 Figure 24.1 Two patterns of speciation Slide 3 Figure 24.2a The biological species concept is based on interfertility…

Slide 1 Chapter 24 Notes The Origin of Species Slide 2 There is more to evolution than just explaining how adaptations evolve in a population. Evolution must also explain…

Slide 1 Chapter 24 ~ The Origin of Species Slide 2 What is a species? Morphological species concept (Linnaeus):Morphological species concept (Linnaeus): grouping based on…

Slide 1 Speciation Slide 2 What is Speciation? How does speciation occur? The formation of a species; when two or more species are created from an ancestral group Occurs…