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 132
... progenitor of the ostrich genus had habits like those of a bustard , and that as natural selection increased in ... progenitors ; for as the tarsi are almost always lost in many dung - feeding beetles , they must be lost early in life ...
... progenitor of the ostrich genus had habits like those of a bustard , and that as natural selection increased in ... progenitors ; for as the tarsi are almost always lost in many dung - feeding beetles , they must be lost early in life ...
Page 135
... progenitor or progenitors of these several species may formerly have ranged widely over both continents , and have since ( like the elephant on both continents ) become extinct , excepting in their present secluded habitations . Far USE ...
... progenitor or progenitors of these several species may formerly have ranged widely over both continents , and have since ( like the elephant on both continents ) become extinct , excepting in their present secluded habitations . Far USE ...
Page 141
... progenitor may have acquired through natural selection some one modification in structure , and , after thousands of generations , some other and independent modification ; and these two modifications , having been transmitted to a ...
... progenitor may have acquired through natural selection some one modification in structure , and , after thousands of generations , some other and independent modification ; and these two modifications , having been transmitted to a ...
Page 146
... progenitor of the genus . This period will seldom be remote in any extreme degree , as species very rarely endure for more than one geological period . An extraordinary amount of modification implies an unusually large and long ...
... progenitor of the genus . This period will seldom be remote in any extreme degree , as species very rarely endure for more than one geological period . An extraordinary amount of modification implies an unusually large and long ...
Page 148
... progenitor , for it can rarely have happened that natural selection will have modified several species , fitted to more or less widely - different habits , in exactly the same manner and as these so - called generic characters have been ...
... progenitor , for it can rarely have happened that natural selection will have modified several species , fitted to more or less widely - different habits , in exactly the same manner and as these so - called generic characters have been ...
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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