On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeEaston Press, 1976 - 470 páginas |
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Página 288
... geological record under an imaginary illustration . The Malay Archipelago is about the size of Europe from the North Cape to the Mediterranean , and from Britain to Russia ; and therefore equals all the geological formations which have ...
... geological record under an imaginary illustration . The Malay Archipelago is about the size of Europe from the North Cape to the Mediterranean , and from Britain to Russia ; and therefore equals all the geological formations which have ...
Página 298
... geological record is in any degree perfect , will undoubtedly at once reject the theory . For my part , following out Lyell's metaphor , I look at the geological record as a history of the world imperfectly kept , and written in a ...
... geological record is in any degree perfect , will undoubtedly at once reject the theory . For my part , following out Lyell's metaphor , I look at the geological record as a history of the world imperfectly kept , and written in a ...
Página 450
... geological period . FELIDE . The Cat - family . FERAL . Having become wild from a state of cultivation or domestication . FLORA . The totality of the plants growing naturally in a country , or during a given geological period . FLORETS ...
... geological period . FELIDE . The Cat - family . FERAL . Having become wild from a state of cultivation or domestication . FLORA . The totality of the plants growing naturally in a country , or during a given geological period . FLORETS ...
Contenido
VARIATION UNDER NATURE | 30 |
STRUGGLE FOR EXISTENCE | 45 |
NATURAL SELECTION | 59 |
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Términos y frases comunes
accumulated adapted admit affinities allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common progenitor continuous crossed crustaceans degree developed difficulty distinct species divergence doubt effects eggs embryo existing exterminated extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period gradations greater number groups of species habits Hence hybrids hybrids produced 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 offspring organisation organs Origin of Species parent peculiar perfect pigeons pistil plants pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds slight South America stamens sterility structure struggle successive supposed swimbladder theory variability variations varieties vary whilst whole wings young