
Analytical Chemistry in Archaeology
A. M. Pollard, R. A. Armitage, C. M. Batt
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by Roger Butlin, Jon Bridle, Dolph Schluter
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The diversity of species of plants and animals is the net result of the origin of new species by the splitting of existing lineages (speciation) and the loss of species through extinction. Why there are more species in some groups of organisms, in some places or at some times depends on the balance of these processes.
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