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 22
... larva will almost certainly entail changes in the mature animal . ] In monstrosities , the correlations be- tween quite distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this ...
... larva will almost certainly entail changes in the mature animal . ] In monstrosities , the correlations be- tween quite distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this ...
Page 84
... larvæ . So , conversely , modifications in the adult will probably often affect the structure of the larva ; but in all cases natural selection will ensure that modifications consequent on other modifications at a different period of ...
... larvæ . So , conversely , modifications in the adult will probably often affect the structure of the larva ; but in all cases natural selection will ensure that modifications consequent on other modifications at a different period of ...
Page 117
... larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of differentiation of the different parts ( in the adult state , as I should be inclined to add ) and their specialisation for different ...
... larva . Von Baer's standard seems the most widely applicable and the best , namely , the amount of differentiation of the different parts ( in the adult state , as I should be inclined to add ) and their specialisation for different ...
Page 139
... larva , will , it may safely be concluded , affect the structure of the adult ; in the same manner as any malconformation affecting the early embryo , seriously affects the whole organisation of the adult . The several parts of the body ...
... larva , will , it may safely be concluded , affect the structure of the adult ; in the same manner as any malconformation affecting the early embryo , seriously affects the whole organisation of the adult . The several parts of the body ...
Page 175
... larva of the dragon - fly and in the fish Cobites . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and the stomach respire . In such cases natural selection might specialise , if any ...
... larva of the dragon - fly and in the fish Cobites . In the Hydra , the animal may be turned inside out , and the exterior surface will then digest and the stomach respire . In such cases natural selection might specialise , if any ...
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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