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 |
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Página xv
... called my attention , through Mr. Brace , to the above passage in Dr. Wells ' work . The Hon . and Rev. W. Herbert , afterwards Dean of Manchester , in the fourth volume of the ' Horticultural Transactions , ' 1822 , and in his work on ...
... called my attention , through Mr. Brace , to the above passage in Dr. Wells ' work . The Hon . and Rev. W. Herbert , afterwards Dean of Manchester , in the fourth volume of the ' Horticultural Transactions , ' 1822 , and in his work on ...
Página 1
... called by one of our greatest philosophers . On my return home , it occurred to me , in 1837 , that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly ...
... called by one of our greatest philosophers . On my return home , it occurred to me , in 1837 , that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly ...
Página 3
... called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chap- ters , the most apparent and gravest difficulties in accepting the theory will be given ...
... called Diver- gence of Character . In the next chapter I shall discuss the complex and little known laws of variation . In the five succeeding chap- ters , the most apparent and gravest difficulties in accepting the theory will be given ...
Página 4
... called the same genera are lineal descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am convinced that ...
... called the same genera are lineal descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am convinced that ...
Página 6
... called monstrosities arise ; but monstrosities cannot be separated by any distinct line from slighter variations . All such changes of structure , whether extremely slight or strongly marked , which appear amongst many individuals ...
... called monstrosities arise ; but monstrosities cannot be separated by any distinct line from slighter variations . All such changes of structure , whether extremely slight or strongly marked , which appear amongst many individuals ...
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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