Chapter 23

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University of Toronto Scarborough
Biological Sciences
Kamini Persaud

Sanchika Kanagalingam April 1 2011 Biology II Chapter 23: Species and their Formation What are species? Speciation- the process by which one species splits into two or more daughter species. Speciation occurs gradually over a long period of time Species- kind defined in different ways Morphological Species Concept Classify them differently by how they look Darwin was one of the people who used this concept Members would look alike because they share alleles Binomial system of nomenclature- every species have a genus o not good enough o eg.female- this is a new species male- this is a different species because they dont look alike o different breeds of dogs dont not look the same but they can breed Biological Species Concept: (Ernst Mayr) classify species based on where they can produce viable offsprings two different species can also live together and cant reproduce you can mate with individuals in your group but not ouside some animals are morphologically distinct but are not biologically distinct
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