On the Origin of Species by Means of Natural Selection |
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Page 6
... namely , intercross- ing , isolation , number of individuals - Slow action - Extinction caused by Natural Selection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action ...
... namely , intercross- ing , isolation , number of individuals - Slow action - Extinction caused by Natural Selection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action ...
Page 12
... namely , first , the difficulties of transitions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately con structed organ ; secondly , the subject of ...
... namely , first , the difficulties of transitions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately con structed organ ; secondly , the subject of ...
Page 13
... namely , that each species has been independently created - is erroneous . I am fully convinced that species are not immutable ; 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 erroneous . I am fully convinced that species are not immutable ; but that those belonging to what are called the same genera are lineal descendants of some other and ...
Page 20
... 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 27
... 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 ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic Europe existing exterminated extinct extremely facts favourable 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 laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely