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 xiii
... appears to exist an adaptation to an end . Wheresoever , there- fore , all things together ( that is all the parts of one whole ) happened like as if they were made for the sake of something , these were preserved , having been ...
... appears to exist an adaptation to an end . Wheresoever , there- fore , all things together ( that is all the parts of one whole ) happened like as if they were made for the sake of something , these were preserved , having been ...
Página xviii
... appears that this eminent philosopher felt in 1858 his con- fidence shaken that the Apteryx and the Red Grouse first appeared in their respective homes , " he knew not how , " or by some process " he knew not what . " This Address was ...
... appears that this eminent philosopher felt in 1858 his con- fidence shaken that the Apteryx and the Red Grouse first appeared in their respective homes , " he knew not how , " or by some process " he knew not what . " This Address was ...
Página xix
... appears that Dr. Freke , in 1851 ( ' Dublin Medical Press , ' p . 322 ) , propounded the doctrine that all organic beings have descended from one primordial form . His grounds of belief and treatment of the subject are wholly different ...
... appears that Dr. Freke , in 1851 ( ' Dublin Medical Press , ' p . 322 ) , propounded the doctrine that all organic beings have descended from one primordial form . His grounds of belief and treatment of the subject are wholly different ...
Página xx
... appears that the celebrated botanist and palæontologist Unger published , in 1852 , his belief that species undergo development and modifi- cation . D'Alton , likewise , in Pander and Dalton's work on Fossil Sloths , expressed , in 1821 ...
... appears that the celebrated botanist and palæontologist Unger published , in 1852 , his belief that species undergo development and modifi- cation . D'Alton , likewise , in Pander and Dalton's work on Fossil Sloths , expressed , in 1821 ...
Página 5
... appear to act in two ways , -directly on the whole organisation or on certain parts alone , and indirectly by affecting the reproductive system . With respect to the direct action , we must bear in mind that in every CHAP . 1 ...
... appear to act in two ways , -directly on the whole organisation or on certain parts alone , and indirectly by affecting the reproductive system . With respect to the direct action , we must bear in mind that in every CHAP . 1 ...
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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