The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen1AMS Press, 1972 - 479 páginas This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy! |
Dentro del libro
Resultados 1-3 de 6
Página 105
... larva of an insect to a score of contingencies , wholly different from those which concern the mature insect ; and these modifi- cations may effect , through correlation , the structure of the adult . So , conversely , modifications in ...
... larva of an insect to a score of contingencies , wholly different from those which concern the mature insect ; and these modifi- cations may effect , through correlation , the structure of the adult . So , conversely , modifications in ...
Página 151
... larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of differentiation of the parts of the same organic being , in the adult state as I should be inclined to add , and their specialisation for ...
... larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of differentiation of the parts of the same organic being , in the adult state as I should be inclined to add , and their specialisation for ...
Página 229
... larva of the dragon - fly and in the fish Cobites the alimentary canal respires , digests , and excretes . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and the stomach respire . In such ...
... larva of the dragon - fly and in the fish Cobites the alimentary canal respires , digests , and excretes . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and the stomach respire . In such ...
Contenido
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
Derechos de autor | |
Otras 5 secciones no mostradas
Términos y frases comunes
acquired adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree developed difficulty distinct species disuse domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young