On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
From inside the book
Results 6-10 of 100
Page 84
... modifications , often of the most unexpected nature . As we see that those variations which under domesti- cation ... modify organic beings at any age , by the accumulation of variations profitable at that age , and by their in ...
... modifications , often of the most unexpected nature . As we see that those variations which under domesti- cation ... modify organic beings at any age , by the accumulation of variations profitable at that age , and by their in ...
Page 85
... modification would be very slow , and there would be simultaneously the most rigorous selection of the young birds ... modify one sex in its functional relations to the other sex , or in relation to wholly different habits of life in the ...
... modification would be very slow , and there would be simultaneously the most rigorous selection of the young birds ... modify one sex in its functional relations to the other sex , or in relation to wholly different habits of life in the ...
Page 91
... modifications , each profitable to the preserved being ; and as modern geology has almost banished such views as the ... modification in their structure . On the Intercrossing of Individuals . I must here introduce a short digression ...
... modifications , each profitable to the preserved being ; and as modern geology has almost banished such views as the ... modification in their structure . On the Intercrossing of Individuals . I must here introduce a short digression ...
Page 97
... modification surely but slowly follow from this unconscious process of selection , notwithstanding a large amount of ... modifying and improving a species in the several districts , there will be intercrossing with the other individuals ...
... modification surely but slowly follow from this unconscious process of selection , notwithstanding a large amount of ... modifying and improving a species in the several districts , there will be intercrossing with the other individuals ...
Page 98
... modification , uniformity of character can be given to their modified offspring , solely by natural selection ... modify all the individuals of a varying species throughout the area in the same manner in relation to the same conditions ...
... modification , uniformity of character can be given to their modified offspring , solely by natural selection ... modify all the individuals of a varying species throughout the area in the same manner in relation to the same conditions ...
Other editions - View all
Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely