The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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viii 페이지
... groups of species- On their sudden appearance in the lowest known fossiliferous strata- Antiquity of the habitable earth CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . Page 247 On the slow and successive appearance of new ...
... groups of species- On their sudden appearance in the lowest known fossiliferous strata- Antiquity of the habitable earth CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . Page 247 On the slow and successive appearance of new ...
ix 페이지
... groups subordinate to groups - Natural system - Rules and difficulties in classification , explained on the theory of descent with modifi- cation - Classification of varieties - Descent always used in classification- Analogical or ...
... groups subordinate to groups - Natural system - Rules and difficulties in classification , explained on the theory of descent with modifi- cation - Classification of varieties - Descent always used in classification- Analogical or ...
xii 페이지
... 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 modified . Homological structure of the ...
... 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 modified . Homological structure of the ...
xiv 페이지
... groups , and by the analogy of domestic productions . With respect to the means of modification , he attributed something to the direct action of the physical condi- tions of life , something to the crossing of already existing forms ...
... groups , and by the analogy of domestic productions . With respect to the means of modification , he attributed something to the direct action of the physical condi- tions of life , something to the crossing of already existing forms ...
20 페이지
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
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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