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 100
... is historically known that the ancient black cattle were displaced by the long - horns , and that these ' were swept away by the short - horns ' ( I quote the words of an agricultural writer ) 100 ON THE ORIGIN OF SPECIES.
... is historically known that the ancient black cattle were displaced by the long - horns , and that these ' were swept away by the short - horns ' ( I quote the words of an agricultural writer ) 100 ON THE ORIGIN OF SPECIES.
Página 113
... ancient epochs when the branching lines of descent had diverged less . 14 to We shall I see no reason to limit the process of modification , as now explained , to the formation of genera alone . If , in our diagram , we suppose the ...
... ancient epochs when the branching lines of descent had diverged less . 14 to We shall I see no reason to limit the process of modification , as now explained , to the formation of genera alone . If , in our diagram , we suppose the ...
Página 114
... ancient species having transmitted descendants , and on the view of all the descendants of the same species making a class , we can understand how it is that there exist but very few classes in each main division of the animal and vege ...
... ancient species having transmitted descendants , and on the view of all the descendants of the same species making a class , we can understand how it is that there exist but very few classes in each main division of the animal and vege ...
Página 126
... ancient life have not been preserved , owing to the less severe com- petition to which the inhabitants of these dark abodes will probably have been exposed . Acclimatisation . - Habit is hereditary with plants , as in the period of ...
... ancient life have not been preserved , owing to the less severe com- petition to which the inhabitants of these dark abodes will probably have been exposed . Acclimatisation . - Habit is hereditary with plants , as in the period of ...
Página 128
... incessant advice given in agricultural works , even in the ancient Encyclopædias of China , to be very cautious in transposing animals from one district to another ; for it is not likely that man should 128 ON THE ORIGIN OF SPECIES.
... incessant advice given in agricultural works , even in the ancient Encyclopædias of China , to be very cautious in transposing animals from one district to another ; for it is not likely that man should 128 ON THE ORIGIN OF SPECIES.
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