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 334
... oceanic islands . I freely admit the former existence of many islands , now buried beneath the sea , which may have served as halting- places for plants and for many animals during their migration . In the coral - producing oceans such ...
... oceanic islands . I freely admit the former existence of many islands , now buried beneath the sea , which may have served as halting- places for plants and for many animals during their migration . In the coral - producing oceans such ...
Página 363
... island ; and many islands situated at a much less distance are equally barren . The Falkland Islands , which are inhabited by a wolf - like fox , come nearest to an exception ; but this group cannot be considered as oceanic , as it lies ...
... island ; and many islands situated at a much less distance are equally barren . The Falkland Islands , which are inhabited by a wolf - like fox , come nearest to an exception ; but this group cannot be considered as oceanic , as it lies ...
Página 364
... oceanic islands , with the absence of all other terrestrial mammals . Another interesting relation exists , namely , between the depth of the sea separating islands from each other or from the nearest continent , and the degree of ...
... oceanic islands , with the absence of all other terrestrial mammals . Another interesting relation exists , namely , between the depth of the sea separating islands from each other or from the nearest continent , and the degree of ...
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