On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 51
... tend to become converted into new and distinct species . The larger genera thus tend to become larger ; and throughout nature the forms of life which are now dominant tend to become still more dominant by leaving many modified and ...
... tend to become converted into new and distinct species . The larger genera thus tend to become larger ; and throughout nature the forms of life which are now dominant tend to become still more dominant by leaving many modified and ...
Page 111
... tend to produce offspring similarly characterized . This principle of preservation , I have called , for the sake of brevity , Natural Selection . Natural selec- tion , on the principle of qualities being inherited at corre- sponding ...
... tend to produce offspring similarly characterized . This principle of preservation , I have called , for the sake of brevity , Natural Selection . Natural selec- tion , on the principle of qualities being inherited at corre- sponding ...
Page 145
... tend to vary in the same way , and homologous parts tend to cohere . Modifications in hard parts and in external parts sometimes affect softer and internal parts . When one part is largely developed , perhaps it tends to draw nourish ...
... tend to vary in the same way , and homologous parts tend to cohere . Modifications in hard parts and in external parts sometimes affect softer and internal parts . When one part is largely developed , perhaps it tends to draw nourish ...
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Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence domestic doubt eggs embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flower formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring perfect pigeons pistil plants pollen present probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder theory tion trees variability variations vary whole widely