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Preview Directionality in the History of Life: Diffusion from the Left ... - iSites pdf file

Nov 30, 2007 ... Issues of directionality in the history of life can be framed in terms of six major evolu- tionary steps ... always sensed the failure of the fossil record to supply ... alf and catalytic molecules that make UP cells runs from .... of Earth's crust and hydrosphere and may ..... and others, vascular plants echo the combi-.



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