Slide 1C HARLES D ARWIN : T HEORY OF E VOLUTION AS A M ECHANISTIC P ROCESS JRMG Bio1 2008 Slide 2 D ARWIN S I DEA OF C OMMON D ESCENT Descent with modification A.K.A EVOLUTION…

Slide 1Higher Biology Speciation Slide 2 2 By the end of this lesson you should be able to: Explain what a species is Know what is meant by a gene pool Know what happens…

Slide 1Origins Of Biological Diversity Chapter 15 Slide 2 Species A population or group of populations whose members have the ability to breed with one another and produce…

Slide 1 Macroevolution A change of one species into an entirely new species! **Macroevolution encompasses the grandest trends and transformations in evolution, such as the…

Slide 1 Speciation How are new species created? Slide 2 What is a species? According to the biological species concept, a species is a group whose members can breed with…

Slide 1 Slide 2 Slide 3 What is a species? It can seem obvious when two individuals are of different species, e.g. the lion and the tiger. What about the Bengal tiger and…

Slide 1 How do new species arise? -- Speciation -- Species: group of organisms that can interbreed and produce fertile offspring Speciation: the process by which genetically…

Slide 1 Speciation Slide 2 Introduction Species continue to evolve Changes that occur within species (microevolution) are easy to understand – Faster-running cheetahs –…

Slide 1 SPECIATION Slide 2 MICROEVOLUTION Microevolution is the change in allele frequencies within a population over a few generations Insects that carry the allele which…

How Does Evolution Work? Individual organisms cannot evolve. Populations of a particular species evolve. Natural selection acts on the range of phenotypes in a population.…