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 xiii
... appears to exist an adaptation to an end . Wheresoever , therefore , 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 , therefore , 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 confidence 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 confidence 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 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 case , as Professor ...
... 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 case , as Professor ...
Página 6
... appear to be nearly uniform . The effects on the offspring are either definite or indefinite . They may be considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several genera ...
... appear to be nearly uniform . The effects on the offspring are either definite or indefinite . They may be considered as definite when all or nearly all the offspring of individuals exposed to certain conditions during several genera ...
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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