On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
Dentro del libro
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Página 57
... hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is as immeasurably superior to man's feeble efforts , as the works of Nature are to those of Art . We will now discuss in ...
... hand of Nature . But Natural Selection , as we shall hereafter see , is a power incessantly ready for action , and is as immeasurably superior to man's feeble efforts , as the works of Nature are to those of Art . We will now discuss in ...
Página 63
... hand , in some cases , as with the elephant and rhinoceros , none are destroyed by beasts of prey : even the tiger in India most rarely dares to attack a young elephant protected by its dam . Climate plays an important part in ...
... hand , in some cases , as with the elephant and rhinoceros , none are destroyed by beasts of prey : even the tiger in India most rarely dares to attack a young elephant protected by its dam . Climate plays an important part in ...
Página 65
... hand , in many cases , a large stock of individuals of the same species , relatively to the num- bers of its enemies , is absolutely necessary for its pre- servation . Thus we can easily raise plenty of corn and rape - seed , etc. , in ...
... hand , in many cases , a large stock of individuals of the same species , relatively to the num- bers of its enemies , is absolutely necessary for its pre- servation . Thus we can easily raise plenty of corn and rape - seed , etc. , in ...
Página 66
... hand of man ; but several hundred acres of exactly the same nature had been enclosed twenty - five years previously and planted with Scotch fir . The change in the native vegetation of the planted part of the heath was most remarkable ...
... hand of man ; but several hundred acres of exactly the same nature had been enclosed twenty - five years previously and planted with Scotch fir . The change in the native vegetation of the planted part of the heath was most remarkable ...
Página 73
... hands of man , apply in nature ? I think we shall see that it can act most effectually . Let it be borne in mind in what an endless number of strange peculiarities our domestic productions , and , in a lesser degree , those under nature ...
... hands of man , apply in nature ? I think we shall see that it can act most effectually . Let it be borne in mind in what an endless number of strange peculiarities our domestic productions , and , in a lesser degree , those under nature ...
Otras ediciones - Ver todas
On the Origin of Species by Means of Natural Selection: or the Preservation ... Charles Darwin Vista previa limitada - 2023 |
Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely