An Origin Of Species Independent Of Geographical Isolation?
Friday, July 17, 2009 - 19:07
in Biology & Nature
In the 150 years since the publication of Charles Darwin's 'Origin of Species', despite consistent patterns of biodiversity identified over space, time, organism type and geographical region, there still remain two views of the process of 'speciation', the evolutionary process by which new biological species arise. The first requires a physical barrier; a glacier, mountain or body of water that separates organisms, enabling groups to diverge until they become separate species. In the second scenario, an environment favors specific characteristics within a species, which encourages divergence as members fill different roles in an ecosystem. read more
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