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
Página 4
... vary however slightly in any manner profit- able to itself , under the complex and sometimes varying conditions of life , will have a better chance of surviving , and thus be naturally selected . From the strong principle of inheritance ...
... vary however slightly in any manner profit- able to itself , under the complex and sometimes varying conditions of life , will have a better chance of surviving , and thus be naturally selected . From the strong principle of inheritance ...
Página 7
... vary , it generally continues to vary for many generations . No case is on record of VARIATION UNDER DOMESTICATION 7.
... vary , it generally continues to vary for many generations . No case is on record of VARIATION UNDER DOMESTICATION 7.
Página 9
... vary very slightly - perhaps hardly more than in a state of nature . A long list could easily be given of ' sporting plants ' ; by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very ...
... vary very slightly - perhaps hardly more than in a state of nature . A long list could easily be given of ' sporting plants ' ; by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very ...
Página 16
... vary , and likewise to withstand diverse climates . I do not dispute that these capacities have added largely to the value of most of our domesticated productions ; but how could a savage possibly know , when he first tamed an animal ...
... vary , and likewise to withstand diverse climates . I do not dispute that these capacities have added largely to the value of most of our domesticated productions ; but how could a savage possibly know , when he first tamed an animal ...
Página 20
... varies in a highly remarkable manner . The number of the caudal and sacral vertebræ vary ; as does the number of the ribs , together with their relative breadth and the presence of processes . The size and shape of the apertures in the ...
... varies in a highly remarkable manner . The number of the caudal and sacral vertebræ vary ; as does the number of the ribs , together with their relative breadth and the presence of processes . The size and shape of the apertures in the ...
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