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 44
... developed in some slight degree in an unusual manner , or a pouter till he saw a pigeon with a crop of somewhat unusual size ; and the more abnormal or unusual any character was when it first appeared , the more likely it would be to ...
... developed in some slight degree in an unusual manner , or a pouter till he saw a pigeon with a crop of somewhat unusual size ; and the more abnormal or unusual any character was when it first appeared , the more likely it would be to ...
Page 116
... developed , have now become extinct . Looking still more remotely to the future , we may predict that , owing to the continued and steady increase of the larger groups , a multitude of smaller groups will become utterly extinct , and ...
... developed , have now become extinct . Looking still more remotely to the future , we may predict that , owing to the continued and steady increase of the larger groups , a multitude of smaller groups will become utterly extinct , and ...
Page 118
... developed in each flower ; whereas other botanists , probably with more truth , look at the plants which have their ... developed than others ? Why have not the more highly developed forms everywhere supplanted and exterminated the lower ...
... developed in each flower ; whereas other botanists , probably with more truth , look at the plants which have their ... developed than others ? Why have not the more highly developed forms everywhere supplanted and exterminated the lower ...
Page 119
... develop- ment - it only takes advantage of such variations as arise and are beneficial to each creature under its complex relations of life . And it may be asked what advantage , as far as we can see , would it be to an infusorian ...
... develop- ment - it only takes advantage of such variations as arise and are beneficial to each creature under its complex relations of life . And it may be asked what advantage , as far as we can see , would it be to an infusorian ...
Page 129
... developed in an unusual manner are highly variable : specific characters more variable than generic : secondary sexual characters variable - Species of the same genus vary in an analogous manner- -Reversions to long - lost characters ...
... developed in an unusual manner are highly variable : specific characters more variable than generic : secondary sexual characters variable - Species of the same genus vary in an analogous manner- -Reversions to long - lost characters ...
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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