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! |
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Página 169
... wings that they cannot fly ; and that , of the twenty - nine endemic genera , no less than twenty - three have all their species in this condition ! Several facts , namely , that beetles in many parts of the world are frequently blown ...
... wings that they cannot fly ; and that , of the twenty - nine endemic genera , no less than twenty - three have all their species in this condition ! Several facts , namely , that beetles in many parts of the world are frequently blown ...
Página 240
... wing of a bird and the membrane - covered wing of a bat ; and still more so the four wings of a butterfly , the two wings of a fly , and the two wings with the elytra of a beetle . Bivalve shells are made to open and shut , but on what ...
... wing of a bird and the membrane - covered wing of a bat ; and still more so the four wings of a butterfly , the two wings of a fly , and the two wings with the elytra of a beetle . Bivalve shells are made to open and shut , but on what ...
Página 317
... wings of birds or bats , or the sudden conversion of a Hipparion into a horse , hardly any light is thrown by the belief in abrupt modifications on the deficiency of connecting links in our geological forma- tions . But against the ...
... wings of birds or bats , or the sudden conversion of a Hipparion into a horse , hardly any light is thrown by the belief in abrupt modifications on the deficiency of connecting links in our geological forma- tions . But against the ...
Contenido
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
Derechos de autor | |
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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