Evolutionary biology is a historical science. It seeks to understand the series of events that have led from a prior state or condition to a new, and hence derived, state or condition. In this quest, emphasis may be placed either on the reconstruction of the sequential order of events and the proper identification of intermediate states, or on the elucidation of the processes that led up to these events. In either approach, whether it is the pattern of events itself or the biological process that led to the pattern that is of interest, we need to assume the existence of a prior state, an origin where the evolutionary journey began and where the scientific journey must begin as well.
KeywordsClay Sulfide Codon Polysaccharide Sedimentation
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