 | Peter Gay - 1994 - 720 páginas
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 | Jack E. Staub - 1994 - 390 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...manner profitable to itself, under the complex and somewhat varying conditions of life, will have a better chance of surviving, and thus be naturally... | |
 | Patrick Parrinder - 1995 - 190 páginas
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 | Patrick Parrinder - 1995 - 188 páginas
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 | Laura L. Betzig - 1997 - 520 páginas
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 | James Reeve Pusey - 1998 - 282 páginas
...make the fit fit. It works no change on any being. Darwin wrote, in the introduction to The Origin that "any being, if it vary however slightly in any...better chance of surviving, and thus be naturally selected."106 But no being does vary genetically, even slightly, in its lifetime. No being adapts itself... | |
 | Granville C. Henry - 1998 - 260 páginas
...existence, it follows that any being, if it vary . . . slightly in any manner profitable to itself, will have a better chance of surviving, and thus be naturally selected. 5 A single example: Some mosquitoes give birth to thousands of offspring. Most die when sprayed with... | |
 | James R. Aubrey - 1999 - 282 páginas
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 | William J. Pardue - 1999 - 246 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... 
