World Trade and Biological Exchanges Before 1492 by Carl Johannessen, Jerrid Wolflick, John Sorenson

World Trade and Biological Exchanges Before 1492

Carl Johannessen, Jerrid Wolflick, John Sorenson

604 pages missing pub info (editions)

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A plant, especially a domesticated one, cannot evolve twice on two opposite continents; they require a DNA source. It takes finite time for it to spread. Eighty-five tropical plants were transported from America to the tropical Old World used now ...

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