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 v
... Variability - Effects of Habit - Correlation of Growth — Inheritance - Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic ...
... Variability - Effects of Habit - Correlation of Growth — Inheritance - Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic ...
Page 4
... variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long catalogues of facts . We shall , however , be enabled to ...
... variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long catalogues of facts . We shall , however , be enabled to ...
Page 6
... descendants of that species . Furthermore , I am con- vinced that Natural Selection has been the main but not exclusive means of modification . CHAPTER I VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
... descendants of that species . Furthermore , I am con- vinced that Natural Selection has been the main but not exclusive means of modification . CHAPTER I VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
Page 7
... variability is simply due to our domestic productions having been raised under con- ditions of life not so uniform as , and somewhat different from , those to which the parent - species have been exposed under nature . There is also , I ...
... variability is simply due to our domestic productions having been raised under con- ditions of life not so uniform as , and somewhat different from , those to which the parent - species have been exposed under nature . There is also , I ...
Page 8
... variability , whatever they may be , generally act ; whether during the early or late period of development of the embryo , or at the instant of conception . Geoffroy St. Hilaire's experiments show that unnatural treatment of the embryo ...
... variability , whatever they may be , generally act ; whether during the early or late period of development of the embryo , or at the instant of conception . Geoffroy St. Hilaire's experiments show that unnatural treatment of the embryo ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely