The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página vii
... developed in an unusual manner are highly variable ; specific characters more variable than generic : secondary sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters ...
... developed in an unusual manner are highly variable ; specific characters more variable than generic : secondary sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters ...
Página xviii
... develop- ment and modification of species : he seems to lean towards the side of change . The ' Vestiges of Creation ' appeared in 1844. In the tenth and much improved edition ( 1853 ) the anonymous author says ( p . 155 ) : - " The ...
... develop- ment and modification of species : he seems to lean towards the side of change . The ' Vestiges of Creation ' appeared in 1844. In the tenth and much improved edition ( 1853 ) the anonymous author says ( p . 155 ) : - " The ...
Página 5
... developed being or into an elab- orately constructed organ ; secondly , the subject of In- stinct , or the mental powers of animals ; thirdly , Hybrid- ism , or the infertility of species and the fertility of varieties when intercrossed ...
... developed being or into an elab- orately constructed organ ; secondly , the subject of In- stinct , or the mental powers of animals ; thirdly , Hybrid- ism , or the infertility of species and the fertility of varieties when intercrossed ...
Página 24
... developed crop , which it glories in inflating , may well excite astonishment and even laughter . The turbit has a short and conical beak , with a line of reversed feathers down the breast ; and it has the habit of continually expanding ...
... developed crop , which it glories in inflating , may well excite astonishment and even laughter . The turbit has a short and conical beak , with a line of reversed feathers down the breast ; and it has the habit of continually expanding ...
Página 25
... develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ramus of the lower jaw , varies in a highly remarkable manner . The caudal and sacral ...
... develop- ment of the bones of the face in length and breadth and curvature differs enormously . The shape , as well as the breadth and length of the ramus of the lower jaw , varies in a highly remarkable manner . The caudal and sacral ...
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Términos y frases comunes
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 descendants developed difficulty distinct species disuse divergence 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 increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young