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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... 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 DISTRIBUTION 12. GEOGRAPHICAL DISTRIBUTION - Continued 13. MUTUAL AFFINITIES OF ...
... 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 DISTRIBUTION 12. GEOGRAPHICAL DISTRIBUTION - Continued 13. MUTUAL AFFINITIES OF ...
Página 5
... Instinct , or the mental powers of animals ; thirdly , Hybridism , or the in- fertility of species and the fertility of varieties when intercrossed ; and fourthly , the imperfection of the Geological Record . In the next chapter I shall ...
... Instinct , or the mental powers of animals ; thirdly , Hybridism , or the in- fertility of species and the fertility of varieties when intercrossed ; and fourthly , the imperfection of the Geological Record . In the next chapter I shall ...
Página 8
... instincts ; but how many cultivated plants display the utmost vigour , and yet rarely or never seed ! In some few such cases it has been discovered that very trifling changes , such as a little more or less water at some particular ...
... instincts ; but how many cultivated plants display the utmost vigour , and yet rarely or never seed ! In some few such cases it has been discovered that very trifling changes , such as a little more or less water at some particular ...
Página 155
... instincts be acquired and modified through natural selection ? What shall we say to so marvellous an instinct as that which leads the bee to make cells , which has practically anticipated the dis- coveries of profound mathematicians ...
... instincts be acquired and modified through natural selection ? What shall we say to so marvellous an instinct as that which leads the bee to make cells , which has practically anticipated the dis- coveries of profound mathematicians ...
Página 182
... instinctive hatred of the queen - bee , which urges her instantly to destroy the young queens her daughters as soon as born , or to perish herself in the combat ; for undoubt- edly this is for the good of the community ; and maternal ...
... instinctive hatred of the queen - bee , which urges her instantly to destroy the young queens her daughters as soon as born , or to perish herself in the combat ; for undoubt- edly this is for the good of the community ; and maternal ...
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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