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 11
... distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders believe that long limbs are almost always accompanied by an elongated head . Some instances of ...
... distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders believe that long limbs are almost always accompanied by an elongated head . Some instances of ...
Página 15
... distinct species . If any marked distinction ex- isted between domestic races and species , this source of doubt could not so perpetually recur . stated that domestic races do not other in characters of generic value . be shown that ...
... distinct species . If any marked distinction ex- isted between domestic races and species , this source of doubt could not so perpetually recur . stated that domestic races do not other in characters of generic value . be shown that ...
Página 18
... distinct from those of Germany and conversely , and so with Hungary , Spain , etc. , but that each of these kingdoms possesses several peculiar breeds of cattle , sheep , etc. , we must admit that many domestic breeds have originated in ...
... distinct from those of Germany and conversely , and so with Hungary , Spain , etc. , but that each of these kingdoms possesses several peculiar breeds of cattle , sheep , etc. , we must admit that many domestic breeds have originated in ...
Página 19
... distinct breeds could not be got without extreme care and long - continued selection ; nor can I find a single case on record of a permanent race having been thus formed . On the Breeds of the Domestic Pigeon . - Believing that it is ...
... distinct breeds could not be got without extreme care and long - continued selection ; nor can I find a single case on record of a permanent race having been thus formed . On the Breeds of the Domestic Pigeon . - Believing that it is ...
Página 20
... distinct breeds might be specified . The In the skeletons of the several breeds , the develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ...
... distinct breeds might be specified . The In the skeletons of the several breeds , the develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ...
Otras ediciones - Ver todas
On the Origin of Species by Means of Natural Selection: or the Preservation ... Charles Darwin Vista previa limitada - 2023 |
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