On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1888 - 458 páginas |
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Página vi
... Extinction caused by Natural Selection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
... Extinction caused by Natural Selection - Divergence of Character , related to the diversity of inhabitants of any small area , and to naturalisation - Action of Natural Selection , through Divergence of Character and Extinction , on the ...
Página viii
... Extinction - On simultaneous changes in the forms of life throughout the world On the affinities of extinct species to each other and to living species- On the state of develop- ment of ancient forms - On the succession of the same ...
... Extinction - On simultaneous changes in the forms of life throughout the world On the affinities of extinct species to each other and to living species- On the state of develop- ment of ancient forms - On the succession of the same ...
Página xii
... Extinct forms serving to connect existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and ...
... Extinct forms serving to connect existing groups . On earth adhering to the feet of migratory birds . On the wide geographical range of a species of Galaxias , a fresh - water fish . Discussion on analogical resemblances , enlarged and ...
Página xx
... extinct by new creations , but are tc be regarded as their descendants through continued reproduction . " A well - known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que ...
... extinct by new creations , but are tc be regarded as their descendants through continued reproduction . " A well - known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que ...
Página 3
... Extinction of the less improved forms of life , and leads to what I have called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chapters , the most ...
... Extinction of the less improved forms of life , and leads to what I have called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chapters , the most ...
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Términos y frases comunes
adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important 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 reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young