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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... LAWS OF VARIATION PAGE 1 7 7 41 56 73 119 6. DIFFICULTIES ON THEORY 154 7. INSTINCT 186 8. HYBRIDISM 220 9. ON THE IMPERFECTION OF THE GEOLOGICAL RECORD 250 10. ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS 280 11. GEOGRAPHICAL ...
... LAWS OF VARIATION PAGE 1 7 7 41 56 73 119 6. DIFFICULTIES ON THEORY 154 7. INSTINCT 186 8. HYBRIDISM 220 9. ON THE IMPERFECTION OF THE GEOLOGICAL RECORD 250 10. ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS 280 11. GEOGRAPHICAL ...
Página 5
... 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 difficulties of transi- tions , or in understanding how a ...
... 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 difficulties of transi- tions , or in understanding how a ...
Página 8
... laws are which determine the reproduction of animals under confinement , I may just mention that carnivorous animals , even from the tropics , breed in this country pretty freely under confinement , with the exception of the ...
... laws are which determine the reproduction of animals under confinement , I may just mention that carnivorous animals , even from the tropics , breed in this country pretty freely under confinement , with the exception of the ...
Página 10
... laws of reproduction , of growth , and of inheritance ; for had the action of the conditions ' been direct , if any of the young had varied , all would probably have varied in the same manner . To judge how much , in the case of any ...
... laws of reproduction , of growth , and of inheritance ; for had the action of the conditions ' been direct , if any of the young had varied , all would probably have varied in the same manner . To judge how much , in the case of any ...
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... laws regulating variation , some few of which can be dimly seen , and will be hereafter briefly mentioned . I will ... laws of the correlation of growth . The result of the various , quite unknown , or dimly seen laws of variation is ...
... laws regulating variation , some few of which can be dimly seen , and will be hereafter briefly mentioned . I will ... laws of the correlation of growth . The result of the various , quite unknown , or dimly seen laws of variation is ...
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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