The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeCollier Books, 1962 - 512 páginas |
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Página 19
... tion 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 proposition determined on ...
... tion 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 proposition determined on ...
Página 90
... tion - Divergence of character , related to the diversity of in- habitants of any small area , and to naturalisation — Action of natural selection , through divergence of character and extinc- tion , on the descendants from a common ...
... tion - Divergence of character , related to the diversity of in- habitants of any small area , and to naturalisation — Action of natural selection , through divergence of character and extinc- tion , on the descendants from a common ...
Página 138
... tion - Correlated variation - Compensation and economy of growth - False correlations - Multiple , rudimentary , and lowly organised structures variable - Parts developed in an unusual manner are highly variable ; specific characters ...
... tion - Correlated variation - Compensation and economy of growth - False correlations - Multiple , rudimentary , and lowly organised structures variable - Parts developed in an unusual manner are highly variable ; specific characters ...
Contenido
An Historical Sketch | 15 |
Introduction | 25 |
Variation Under Nature | 58 |
Derechos de autor | |
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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 common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species 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 offspring organisation organs Origin of Species parent peculiar perfect pigeons pistil pollen present principle probably produced progenitor 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