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 121
... migrated over great distances ; whereas , in Egypt , during the last 3,000 years , the conditions of life , as far as we know , have remained absolutely uniform . The fact of little or no modification having been effected since the ...
... migrated over great distances ; whereas , in Egypt , during the last 3,000 years , the conditions of life , as far as we know , have remained absolutely uniform . The fact of little or no modification having been effected since the ...
Page 134
... migrated by successive generations from the outer world into the deeper and deeper recesses of the Kentucky caves , as did European animals into the caves of Europe . We have some evidence of this gradation of habit ; for , as Schiödte ...
... migrated by successive generations from the outer world into the deeper and deeper recesses of the Kentucky caves , as did European animals into the caves of Europe . We have some evidence of this gradation of habit ; for , as Schiödte ...
Page 189
... migrate and to lay her eggs in other birds ' nests . An action , which we ourselves should require experience to enable us to perform , when performed by an animal , more especially by a very young one , without any experience , and ...
... migrate and to lay her eggs in other birds ' nests . An action , which we ourselves should require experience to enable us to perform , when performed by an animal , more especially by a very young one , without any experience , and ...
Page 197
... migrate at a very early period ; and the first hatched young would probably have to be fed by the male alone . But the American cuckoo is in this pre- dicament ; for she makes her own nest and has eggs and young successively hatched ...
... migrate at a very early period ; and the first hatched young would probably have to be fed by the male alone . But the American cuckoo is in this pre- dicament ; for she makes her own nest and has eggs and young successively hatched ...
Page 198
... migrate , it is the slaves which determine the migration , and actually carry their masters in their jaws . So utterly helpless are the masters , that when Huber shut up thirty 198 INSTINCT.
... migrate , it is the slaves which determine the migration , and actually carry their masters in their jaws . So utterly helpless are the masters , that when Huber shut up thirty 198 INSTINCT.
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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