Charles Darwin: erinevus redaktsioonide vahel

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** {{halliga|As many more individuals of each species 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 however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be ''naturally selected''. From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form.}}
** "Introduction", [http://darwin-online.org.uk/content/frameset?pageseq=20&itemID=F373&viewtype=image lk 5]
 
* Seda printsiipi, et iga nõrk variatsioon säilitatakse, juhul kui see on kasulik, tähistan ma terminiga "looduslik valik" [''Natural Selection''], et tähistada selle sugulust inimese võimega valikuid teha. [[Herbert Spencer]]i sageli kasutatud väljend "kõige kohasemate ellujäämine" [''Survival of the Fittest''] on aga täpsemgi ning mõnikord samavõrra sobiv.
** lk 96
** ptk III: "Struggle For Existence", [http://darwin-online.org.uk/content/frameset?pageseq=101&itemID=F387&viewtype=image lk 72]
 
== "Inimese põlvnemine ja suguline valik" (1871) ==
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