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 52
Página vii
... Supposed incompetence of natural selection to account for the incipient stages of useful structures -Causes which interfere with the acquisition through natural selection of useful structures - Gradations of structure with changed ...
... Supposed incompetence of natural selection to account for the incipient stages of useful structures -Causes which interfere with the acquisition through natural selection of useful structures - Gradations of structure with changed ...
Página xii
... supposed incompetency of natural selection to account for the incipient stages of useful structures . There is also a discussion on the causes which prevent in many cases the acquisition through natural selection of useful structures ...
... supposed incompetency of natural selection to account for the incipient stages of useful structures . There is also a discussion on the causes which prevent in many cases the acquisition through natural selection of useful structures ...
Página xvii
... supposed " impulses " account in a scientific sense for the numerous and beautiful co - adaptations which we see throughout nature ; I cannot see that we thus gain any insight how , for instance , a woodpecker has become adapted to its ...
... supposed " impulses " account in a scientific sense for the numerous and beautiful co - adaptations which we see throughout nature ; I cannot see that we thus gain any insight how , for instance , a woodpecker has become adapted to its ...
Página xx
... supposed to have been caused by some miasma , have arisen and spread over the world , so at certain periods the germs of existing species may have been chemically affected by circum- ambient molecules of a particular nature , and thus ...
... supposed to have been caused by some miasma , have arisen and spread over the world , so at certain periods the germs of existing species may have been chemically affected by circum- ambient molecules of a particular nature , and thus ...
Página 13
... supposed . The lake - inhabitants of Switzerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried on commerce with other nations ...
... supposed . The lake - inhabitants of Switzerland cultivated several kinds of wheat and barley , the pea , the poppy for oil , and flax ; and they possessed several domesticated animals . They also carried on commerce with other nations ...
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