On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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xi 페이지
... Causes of 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 ...
... Causes of 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 ...
xii 페이지
... caused by Natural Selection - Divergence of Cha- racter , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
... caused by Natural Selection - Divergence of Cha- racter , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
3 페이지
... cause of variation . In one very limited sense , as we shall hereafter see , this may be true ; but it is pre- posterous to attribute to mere external conditions , the structure , for instance , of the woodpecker , with its feet , tail ...
... cause of variation . In one very limited sense , as we shall hereafter see , this may be true ; but it is pre- posterous to attribute to mere external conditions , the structure , for instance , of the woodpecker , with its feet , tail ...
5 페이지
... causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss the complex and little known laws of variation and of corre- lation of growth . In ...
... causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss the complex and little known laws of variation and of corre- lation of growth . In ...
6 페이지
... 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 .
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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