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 24
... greater degree , to males alone . A much more important rule , which I think may be trusted , is that , at whatever period of life a peculiarity first appears , it tends to appear in the offspring at a corresponding age , though ...
... greater degree , to males alone . A much more important rule , which I think may be trusted , is that , at whatever period of life a peculiarity first appears , it tends to appear in the offspring at a corresponding age , though ...
Page 25
... greater length of horn , though appearing late in life , is clearly due to the male element . Having alluded to the subject of reversion , I may here refer to a statement often made by naturalists— namely , that our domestic varieties ...
... greater length of horn , though appearing late in life , is clearly due to the male element . Having alluded to the subject of reversion , I may here refer to a statement often made by naturalists— namely , that our domestic varieties ...
Page 34
... greater number of generations . In a breed which has been crossed only once with some distinct breed , the tendency to reversion to any character derived from such cross will naturally become less and less , as in each succeeding ...
... greater number of generations . In a breed which has been crossed only once with some distinct breed , the tendency to reversion to any character derived from such cross will naturally become less and less , as in each succeeding ...
Page 53
... greater number rank it as an undoubted species peculiar to Great Britain . A wide distance between the homes of two doubtful forms leads many naturalists to rank them as distinct species ; but what distance , it has been well asked ...
... greater number rank it as an undoubted species peculiar to Great Britain . A wide distance between the homes of two doubtful forms leads many naturalists to rank them as distinct species ; but what distance , it has been well asked ...
Page 55
... greater number of closely - allied forms . But if his observations be widely extended , he will in the end generally be enabled to make up his own mind which to call varieties and which species ; but he will succeed in this at the ...
... greater number of closely - allied forms . But if his observations be widely extended , he will in the end generally be enabled to make up his own mind which to call varieties and which species ; but he will succeed in this at the ...
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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