Lecture 12 - Lecture 12 1) Morphological Species Concept -...

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Lecture 12 1) Morphological Species Concept - It doesn’t tell us how species are produced and maintained throughout time. a) Where do we draw the line in morphological difference to classify organisms in different species? (Variations within populations) b) Cryptic Species – Similar species that are not able to interbreed. i) Ex.) Anopheles gambiae (mosquito) is comprised of a bunch of different types of morphologically different mosquitoes who can’t interbreed, some who can carry malaria and some who can’t. c) Sexual Dimorphism – Males and females are morphologically drastically different. (ex. Angler fish, quetzals). 2) Biological Species Concept (Ernst Mayr) – Best theory that we have. a) By focusing on reproduction, it defines species on the exchange of genes among individuals within a population. But there are problems: i) Reproductively Isolated – Members of different species aren’t able to reproduce because their gametes are incompatible, or that they just never see each other in nature (different habitats). Even if they did see each other in nature, they wouldn’t be
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This note was uploaded on 02/09/2012 for the course BIOL 104 taught by Professor Smith during the Spring '09 term at Arkansas State.

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Lecture 12 - Lecture 12 1) Morphological Species Concept -...

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