chapter 24 - Djnath_729@yahoo.com Speciation Is the process...

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Djnath_729@yahoo.com Speciation Is the process by which daughter species evolve from parent species Key concept Species consist of one or more populations of individuals that can interbreed and produce offspring o Biological species concept: (based on sexual reproduction) Limitations: Asexual organisms (no information about asexual) Fossils (died LONG time ago, cannot make new babies) Organisms about which little is known regarding their reproduction o Morphological species concept Characterizes a species in terms of body shape, size, structural function Very useful in biological science o Paleontological species concept Focuses on morphologically discrete species known only from the fossil record Maybe not all fossils found an animal, they can guess or predit from the fossils o Ecological species concept Views a species in terms of its ecological niche How species use their natural resources o Phylogenetic species concept Defines a species as a set of organisms with a unique genetic history Computer can determine the species with equipment Populations of a species have a shared genetic history – common ancestor o All humans are from the same species Geographic barriers can start the process of speciation o Allopatric speciation Occupy more area, most common speciation Barrier prevent gene flow
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chapter 24 - Djnath_729@yahoo.com Speciation Is the process...

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