On the Origin of Species by Means of Natural Selection |
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Page 9
... America , and in the geological rela- tions of the present to the past inhabitants of that con- tinent . These facts seemed to me to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of ...
... America , and in the geological rela- tions of the present to the past inhabitants of that con- tinent . These facts seemed to me to throw some light on the origin of species - that mystery of mysteries , as it has been called by one of ...
Page 50
... America and Europe , which differ very slightly from each other , have been ranked by one eminent naturalist as undoubted species , and by another as varieties , or , as they are often called , as geographical races ! Many years ago ...
... America and Europe , which differ very slightly from each other , have been ranked by one eminent naturalist as undoubted species , and by another as varieties , or , as they are often called , as geographical races ! Many years ago ...
Page 64
... America , and latterly in Australia , had not been well authenticated , they would have been quite incredible . So it is with plants : cases could be given of introduced plants which have become common throughout whole islands in a ...
... America , and latterly in Australia , had not been well authenticated , they would have been quite incredible . So it is with plants : cases could be given of introduced plants which have become common throughout whole islands in a ...
Page 66
... America . Here I will make only a few remarks , just to recall to the reader's mind some of the chief points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast ...
... America . Here I will make only a few remarks , just to recall to the reader's mind some of the chief points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast ...
Page 70
... the flies would decrease - then cattle and horses would become feral , and this would certainly greatly alter ( as indeed I have observed in parts of South America ) the vegetation 70 [ CHAP . III MUTUAL CHECKS TO INCREASE .
... the flies would decrease - then cattle and horses would become feral , and this would certainly greatly alter ( as indeed I have observed in parts of South America ) the vegetation 70 [ CHAP . III MUTUAL CHECKS TO INCREASE .
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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