For over a century, opening the black box of embryonic development was the holy grail of biology. Evo Devo-Evolutionary Developmental Biology-is the new science that has finally cracked open the box. Within the pages of his rich and riveting book, Sean B. Carroll explains how we are discovering that complex life is ironically much simpler than anyone ever expected.
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这种演化趋势,就是指一旦数量扩大到一定程度,系列同源结构会在功能上专门化,而在数量上减少。
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