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原文連結
論文資訊
- 類型：已發表論文
- 日期：2011
摘要
I present a new compilation of the distribution of the temporal distribution of new morphologies of 海洋 invertebrates associated with the Ediacaran-Cambrian (578-510 Ma) diversification of Metazoa. Combining this data with previous work on the hierarchical structure of gene regulatory 網絡s, I argue that the distribution of morphologies may be, in part, a record of the time-asymmetric generation of variation. 演化 has been implicitly viewed as a uniformitarian process where the rates may vary but the underlying processes, including the types of variation, are essentially invariant through time. Recent studies demonstrate that this uniformitarian assumption is false, suggesting that the types of variation may vary through time.
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