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 88
... plants seems at first to have no sort of relation to other plants . But from the strong growth of young plants produced from such seeds , as peas and beans , when sown in the midst of long grass , it may be suspected that the chief use ...
... plants seems at first to have no sort of relation to other plants . But from the strong growth of young plants produced from such seeds , as peas and beans , when sown in the midst of long grass , it may be suspected that the chief use ...
Página 235
... plants , single species and single genera possess the power of revolv- ing , and have thus become twiners , they must have inde- pendently acquired it , and cannot have inherited it from a common progenitor . Hence I was led to predict ...
... plants , single species and single genera possess the power of revolv- ing , and have thus become twiners , they must have inde- pendently acquired it , and cannot have inherited it from a common progenitor . Hence I was led to predict ...
Página 236
... plants move after being shaken ; and with climbing plants it is , as we know , only during the early stages of growth that the foot - stalks and tendrils are sensitive . It is scarcely possible that the above slight movements , due to a ...
... plants move after being shaken ; and with climbing plants it is , as we know , only during the early stages of growth that the foot - stalks and tendrils are sensitive . It is scarcely possible that the above slight movements , due to a ...
Contenido
An Historical Sketch | 15 |
Introduction | 25 |
Variation Under Nature | 58 |
Derechos de autor | |
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The Origin of Species by Means of Natural Selection: Or, The ..., Volumen2 Charles Darwin Vista de fragmentos - 1972 |
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