On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
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Página 4
... chapter of this Abstract to Variation under Domestica- tion . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally or more important , we shall see how great is the power of man ...
... chapter of this Abstract to Variation under Domestica- tion . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally or more important , we shall see how great is the power of man ...
Página 5
... chapter I shall discuss the complex and little known laws of variation and of correlation of growth . In the four succeeding chapters , the most apparent and gravest difficulties on the theory will be given namely , first , the ...
... chapter I shall discuss the complex and little known laws of variation and of correlation of growth . In the four succeeding chapters , the most apparent and gravest difficulties on the theory will be given namely , first , the ...
Página 6
... descendants of that species . Furthermore , I am convinced that Natural Selection has been the main but not exclusive means of modification . CHAPTER I VARIATION UNDER DOMESTICATION Causes of Variability - Effects 6 ON THE ORIGIN OF ...
... descendants of that species . Furthermore , I am convinced that Natural Selection has been the main but not exclusive means of modification . CHAPTER I VARIATION UNDER DOMESTICATION Causes of Variability - Effects 6 ON THE ORIGIN OF ...
Página 7
Or The Preservation of Favoured Races in the Struggle for Life Charles Darwin. CHAPTER I VARIATION UNDER DOMESTICATION Causes of Variability - Effects of Habit - Correlation of Growth- Inheritance - Character of Domestic Varieties ...
Or The Preservation of Favoured Races in the Struggle for Life Charles Darwin. CHAPTER I VARIATION UNDER DOMESTICATION Causes of Variability - Effects of Habit - Correlation of Growth- Inheritance - Character of Domestic Varieties ...
Página 40
... methodically and more quickly , or unconsciously and more slowly , but more efficiently , is by far the pre- dominant Power . CHAPTER II VARIATION UNDER NATURE Variability - Individual differences - 40 ON THE ORIGIN OF SPECIES.
... methodically and more quickly , or unconsciously and more slowly , but more efficiently , is by far the pre- dominant Power . CHAPTER II VARIATION UNDER NATURE Variability - Individual differences - 40 ON THE ORIGIN OF SPECIES.
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Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence 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 land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely