 | John Fowles - 1981 - 378 páginas
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 | Elaine P. Maimon - 1981 - 422 páginas
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 | Richard Lowry - 1971 - 258 páginas
...are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary...principle of inheritance, any selected variety will [then] tend to propagate its new and modified form. Charles Darwin, Origin of Species (1859) These... | |
 | Justin Wintle - 1982 - 744 páginas
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 | Frank Roy Willis - 1982 - 804 páginas
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As many more individuals of each species are born than can possibly survive ; and as, consequently, there is a frequently recurring straggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under... 
