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 |
Dentro del libro
Resultados 1-3 de 13
Página 284
... deposited , it would be equally rash to suppose that it then became extinct . We forget how small the area of Europe is compared with the rest of the world ; nor have the several stages of the same formation throughout Europe been ...
... deposited , it would be equally rash to suppose that it then became extinct . We forget how small the area of Europe is compared with the rest of the world ; nor have the several stages of the same formation throughout Europe been ...
Página 295
... deposited long periods elapsed , as habitable earth long as , or probably far longer than , the whole interval from the Cam- brian age to the present day ; and that during these vast periods the world swarmed with living creatures ...
... deposited long periods elapsed , as habitable earth long as , or probably far longer than , the whole interval from the Cam- brian age to the present day ; and that during these vast periods the world swarmed with living creatures ...
Página 444
... deposited , they seem to me to become ennobled . Judging from the past , we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity . And of the species now living very few will transmit ...
... deposited , they seem to me to become ennobled . Judging from the past , we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity . And of the species now living very few will transmit ...
Contenido
VARIATION UNDER NATURE | 30 |
STRUGGLE FOR EXISTENCE | 45 |
NATURAL SELECTION | 59 |
Derechos de autor | |
Otras 13 secciones no mostradas
Otras ediciones - Ver todas
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