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In Macroevolution, Steven Stanley addresses, from a paleobiologist's perspective, the question of whether punctuated equilibria or gradualism offers the best account of the history of life. Punctuated equilibria, a view popularized by Stephen Jay Gould among others, holds that species remain evolutionarily static for long periods of time and undergo substantial genetic changes and develop new, primarily adaptive, strategies during speciation. In contrast, gradualism views large-scale changes as the result of continual and successive small-scale changes. Coming down on the side of those who favor the model of punctuated equilibria, Stanley argues that only "quantum speciation" (speciation that is rapid and radically divergent) can explain the story of life revealed in the fossil record; macroevolutionary trends, he contends, can be explained by selection among species and, to a lesser extent, by phylogenetic drift and directed speciation.
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A paleontologist presents new evidence in favor the evolution by "punctuated equilibria."About the Author:
Steven M. Stanley is professor of paleobiology at the Johns Hopkins University. He is the author of numerous books, including Extinction and Children of the Ice Age: How a Global Catastrophe Allowed Humans to Evolve.
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Book Description W H Freeman & Co (Sd), 1980. Hardcover. Condition: New. Seller Inventory # DADAX0716710927
Book Description W H Freeman & Co, 1980. Condition: New. book. Seller Inventory # M0716710927
Book Description Condition: New. New. Looks like an interesting title!. Seller Inventory # M-0716710927
Book Description Condition: New. New. Looks like an interesting title!. Seller Inventory # E-0716710927