On the Origin of the Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJohn Murray, 1869 - 596페이지 |
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55개의 결과 중 1 - 5개
v 페이지
... Variability - Effects of Habit - Correlated Variation Inheritance Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons ...
... Variability - Effects of Habit - Correlated Variation Inheritance Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons ...
xii 페이지
... Variability . Limit of variation under domestication . On the great importance of individual differences , and on the unimportance of single variations . Wagner Moritz on the importance of isolation in the formation of species . 146 ...
... Variability . Limit of variation under domestication . On the great importance of individual differences , and on the unimportance of single variations . Wagner Moritz on the importance of isolation in the formation of species . 146 ...
4 페이지
... 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 ...
6 페이지
... species . Further- more , I am convinced that Natural Selection has been the most important but not the exclusive means of modification . CHAPTER I. VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
... species . Further- more , I am convinced that Natural Selection has been the most important but not the exclusive means of modification . CHAPTER I. VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
7 페이지
... Variability - Effects of Habit - Correlated Variation - Inheritance - Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species- Origin of Domestic Varieties from one or more Species - Domestic Pigeons ...
... Variability - Effects of Habit - Correlated Variation - Inheritance - Character of Domestic Varieties - Difficulty of distinguishing between Varieties and Species- Origin of Domestic Varieties from one or more Species - Domestic Pigeons ...
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accumulated adapted affinities allied species America ancient appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt Edition eggs embryo existing exterminated extinct extremely facts favourable females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ less living males mammals manner migration modified descendants natural selection naturalists nearly nest occur oceanic islands offspring organisation parent perfect pigeons pistil pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble seeds sexual sexual selection Silurian slight South America stamens sterility structure struggle successive suppose theory tion variability variations varieties vary vols whole widely