“ It seems clear that organic beings must be exposed during several generations to new conditions to cause any great amount of variation; and that, when the organisation has once begun to vary, it generally continues varying for many generations. ”
Charles Darwin, On The Origin of Species (1859). copy citation
Author | Charles Darwin |
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Source | On The Origin of Species |
Topic | evolution variation generations |
Date | 1859 |
Language | English |
Reference | |
Note | |
Weblink | http://www.gutenberg.org/files/2009/2009-h/2009-h.htm |