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 vi
... genus - The relation of organism to organism the most important of all relations . Page 75 CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on ...
... genus - The relation of organism to organism the most important of all relations . Page 75 CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on ...
Página vii
... genus vary in an analogous manner - Reversions to long - lost characters - Summary . Page 164 CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional ...
... genus vary in an analogous manner - Reversions to long - lost characters - Summary . Page 164 CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional ...
Página xvii
... genus were created in an originally highly plastic condition , and that these have produced , chiefly by intercrossing , but likewise by variation , all our existing species . In 1826 Professor Grant , in the concluding para- graph in ...
... genus were created in an originally highly plastic condition , and that these have produced , chiefly by intercrossing , but likewise by variation , all our existing species . In 1826 Professor Grant , in the concluding para- graph in ...
Página xviii
... genus . " In 1843-44 Professor Haldeman ( ' Boston Journal of Nat . Hist . U. States , ' vol . iv . p . 468 ) has ably given the arguments for and against the hypothesis of the develop- ment and modification of species : he seems to ...
... genus . " In 1843-44 Professor Haldeman ( ' Boston Journal of Nat . Hist . U. States , ' vol . iv . p . 468 ) has ably given the arguments for and against the hypothesis of the develop- ment and modification of species : he seems to ...
Página 18
... genus , in several trifling respects , they often differ in an extreme degree in some one part , both when compared one with another , and more especially when compared with the species under nature to which they are nearest allied ...
... genus , in several trifling respects , they often differ in an extreme degree in some one part , both when compared one with another , and more especially when compared with the species under nature to which they are nearest allied ...
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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