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 |
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Página 12
... character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no ... characters to its grandfather or grandmother or other more remote In ancestor ; why a peculiarity is often ...
... character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no ... characters to its grandfather or grandmother or other more remote In ancestor ; why a peculiarity is often ...
Página 14
... character probably do occur ; but natural selection , as will hereafter be explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals ...
... character probably do occur ; but natural selection , as will hereafter be explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals ...
Página 15
... character than in true species . Domestic races of the same species , also , often have a somewhat monstrous character ... characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the ...
... character than in true species . Domestic races of the same species , also , often have a somewhat monstrous character ... characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the ...
Página 18
... characters be ever so slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several goats in Europe alone , and several even within Great Britain ...
... characters be ever so slight , has had its wild prototype . At this rate there must have existed at least a score of species of wild cattle , as many sheep , and several goats in Europe alone , and several even within Great Britain ...
Página 22
... characters of the domestic breeds . Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , con- sidering their size ...
... characters of the domestic breeds . Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , con- sidering their size ...
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