On the Origin of Species by Means of Natural Selection, Or The Preservation of Favoured Races in the Struggle for LifeIt took Charles Darwin more than twenty years to publish this book, in part because he realized that it would ignite a firestorm of controversy. The Origin of Species first appeared in 1859, and it remains a continuing source of conflict to this day. Even among those who reject its ideas, however, the work's impact is undeniable. In science, philosophy, and theology, this is a book that changed the world. In addition to its status as the focus of a dramatic turning point in scientific thought, On the Origin of Species stands as a remarkably readable study. Carefully reasoned and well-documented in its arguments, the work offers coherent views of natural selection, adaptation, the struggle for existence, survival of the fittest, and other concepts that form the foundation of modern evolutionary theory.--Amazon.com. |
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Page viii
... and of the level of the land , and by occasional means · Dispersal during the Glacial period co - extensive with the world .. - 346-382 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - continued . -- Distribution viii CONTENTS .
... and of the level of the land , and by occasional means · Dispersal during the Glacial period co - extensive with the world .. - 346-382 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - continued . -- Distribution viii CONTENTS .
Page 15
... occasionally revert in some of their characters to ancestral forms , it seems to me not improbable , that if we could succeed in naturalising , or were to cultivate , during many genera- tions , the several races , for instance , of the ...
... occasionally revert in some of their characters to ancestral forms , it seems to me not improbable , that if we could succeed in naturalising , or were to cultivate , during many genera- tions , the several races , for instance , of the ...
Page 20
... occasional crosses , if aided by the careful selection of those individual mongrels , which present any desired character ; but that a race could be obtained nearly intermediate between two extremely different races or speceies , I can ...
... occasional crosses , if aided by the careful selection of those individual mongrels , which present any desired character ; but that a race could be obtained nearly intermediate between two extremely different races or speceies , I can ...
Page 27
... occasionally appearing in all the breeds , both when kept pure and when crossed ; the mongrel offspring being perfectly fertile ; -from these several reasons , taken together , I can feel no doubt that all our domestic breeds have ...
... occasionally appearing in all the breeds , both when kept pure and when crossed ; the mongrel offspring being perfectly fertile ; -from these several reasons , taken together , I can feel no doubt that all our domestic breeds have ...
Page 36
... of improvement , through the occasional preservation of the best indi- viduals , whether or not sufficiently distinct to be ranked at their first appearance as distinct varieties , and whether 36 CHAP . I. UNCONSCIOUS SELECTION .
... of improvement , through the occasional preservation of the best indi- viduals , whether or not sufficiently distinct to be ranked at their first appearance as distinct varieties , and whether 36 CHAP . I. UNCONSCIOUS SELECTION .
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Common terms and phrases
adapted affinities allied species America analogous variations ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence domestic doubt embryo existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period greater number groups of species habits Hence hermaphrodites horse hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ legs less living males mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organisation perfect pigeons pistil plants pollen probably produced progenitor quagga racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs secondary sexual seeds sexual selection Silurian slight sometimes South America sterility striped structure struggle successive supposed tendency theory tion variability varieties vary whole widely