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 50
Página v
... a wide sense - Geometrical ratio of increase - Rapid increase of naturalised animals and plants- Nature of the checks to increase - Competition universal - Effects of climate - Protection from the number of individuals - Complex.
... a wide sense - Geometrical ratio of increase - Rapid increase of naturalised animals and plants- Nature of the checks to increase - Competition universal - Effects of climate - Protection from the number of individuals - Complex.
Página vi
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. climate - Protection from the number of individuals - Complex relations of all animals and plants throughout nature - Struggle for life most severe between ...
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. climate - Protection from the number of individuals - Complex relations of all animals and plants throughout nature - Struggle for life most severe between ...
Página viii
... climate and of the level of the land , and by occasional means - Dispersal during the Glacial period - Alternate Glacial periods in the north and south 296 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh ...
... climate and of the level of the land , and by occasional means - Dispersal during the Glacial period - Alternate Glacial periods in the north and south 296 CHAPTER XIII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh ...
Página xv
... climate , this would at length become the most pre- valent , if not the only race , in the particular country in which it had originated . " He then extends these same views to the white inhabitants of colder climates . I am indebted to ...
... climate , this would at length become the most pre- valent , if not the only race , in the particular country in which it had originated . " He then extends these same views to the white inhabitants of colder climates . I am indebted to ...
Página 2
... climate , food , etc. , as the only possible cause of variation . In one limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of ...
... climate , food , etc. , as the only possible cause of variation . In one limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of ...
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