On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page xii
... namely , intercrossing , isolation , number of individuals - Slow action Extinction caused by Natural Selection - Divergence of Cha- racter , related to the diversity of inhabitants of any small area , and to naturalisation - Action of ...
... namely , intercrossing , isolation , number of individuals - Slow action Extinction caused by Natural Selection - Divergence of Cha- racter , related to the diversity of inhabitants of any small area , and to naturalisation - Action of ...
Page 5
... namely , first , the difficulties of transi- tions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately constructed organ ; secondly , the subject of ...
... namely , first , the difficulties of transi- tions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately constructed organ ; secondly , the subject of ...
Page 6
... namely , that each species has been independently created - is erro- neous . I am fully convinced that species are not im- mutable ; but that those belonging to what are called the same genera are lineal descendants of some other and ...
... namely , that each species has been independently created - is erro- neous . I am fully convinced that species are not im- mutable ; but that those belonging to what are called the same genera are lineal descendants of some other and ...
Page 14
... namely , that our domestic varieties , when run wild , gradually but certainly revert in character to their aboriginal stocks . Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature ...
... namely , that our domestic varieties , when run wild , gradually but certainly revert in character to their aboriginal stocks . Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature ...
Page 23
... namely , that all have descended from the rock - pigeon ( Columba livia ) , including under this term several geographical races or sub - species , which differ from each other in the most trifling respects . As several of the reasons ...
... namely , that all have descended from the rock - pigeon ( Columba livia ) , including under this term several geographical races or sub - species , which differ from each other in the most trifling respects . As several of the reasons ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely