The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432 páginas |
Dentro del libro
Resultados 1-5 de 57
Página viii
... islands -Absence of Batrachians and of terrestrial Mammals - On the relation of the inhabitants of islands to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and ...
... islands -Absence of Batrachians and of terrestrial Mammals - On the relation of the inhabitants of islands to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and ...
Página xvii
... islands respectively . Always , also , it may be well to bear in mind that by the word ' creation ' the zoologist means ' a process he knows not what . " " He amplifies this idea by adding that when such cases as that of the Red Grouse ...
... islands respectively . Always , also , it may be well to bear in mind that by the word ' creation ' the zoologist means ' a process he knows not what . " " He amplifies this idea by adding that when such cases as that of the Red Grouse ...
Página xviii
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. islands owed their origin to a great first Creative Cause . " If we interpret these sentences given in the same Address , one by the other , it appears that ...
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. islands owed their origin to a great first Creative Cause . " If we interpret these sentences given in the same Address , one by the other , it appears that ...
Página 33
... island a great range of varieties connected by intermediate links , and the extreme links of the chain closely resemble the two forms of an allied dimorphic species inhabiting another part of the Malay archi- pelago . Thus also with ...
... island a great range of varieties connected by intermediate links , and the extreme links of the chain closely resemble the two forms of an allied dimorphic species inhabiting another part of the Malay archi- pelago . Thus also with ...
Página 34
... as they are often called , geographical races ! Mr. Wallace , in several valuable papers on the various animals , especially on the Lepidoptera , inhabiting the islands of the great Malayan archi-. 34 [ CHAP . IL DOUBTFUL SPECIES .
... as they are often called , geographical races ! Mr. Wallace , in several valuable papers on the various animals , especially on the Lepidoptera , inhabiting the islands of the great Malayan archi-. 34 [ CHAP . IL DOUBTFUL SPECIES .
Otras ediciones - Ver todas
Términos y frases comunes
accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young