Presidential Address: Significant Features of the Indiana Karst
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It has often been claimed that evolution progresses by two essentially different types of changes, namely macro- and micro- evolutionary changes; or expressed differently, that major systematic categories like orders of phyla “pass through an orderly series of changes “or “program evolution,” while groups of species “evolve progressively along a certain line of change or ‘trend.’” paleontology is supposedly responsible for the examples of program evolution, while genetics offers the available data concerning trend evolution. Needless to say, the geneticist can find his attention to the micro evolutionary changes which he can attack experimentally. But is the practice of contrasting these types of evolutionary change is necessary for just or justifiable on the basis of available information?
Evolutionary Processes, Evolutionary Changes, Paleontology, Geophysicists
Proceedings of the Indiana Academy of Science, Vol. 54 (1944).
Malott, Clyde A., "Presidential Address: Significant Features of the Indiana Karst" (1944). KIP Articles. 4361.