The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1896 |
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Página 231
... swim bladder has , also , been worked in as an accessory to the auditory organs of certain fishes . All physiologists admit that the swimbladder is homologous , or " ideally similar " in position and structure with the lungs of the ...
... swim bladder has , also , been worked in as an accessory to the auditory organs of certain fishes . All physiologists admit that the swimbladder is homologous , or " ideally similar " in position and structure with the lungs of the ...
Página 258
... swimbladder has apparently been converted into an air - breathing lung . The same organ having performed simultaneously very different functions , and then having been in part or in whole specialised for one function ; and two distinct ...
... swimbladder has apparently been converted into an air - breathing lung . The same organ having performed simultaneously very different functions , and then having been in part or in whole specialised for one function ; and two distinct ...
Página 276
... swim - bladder into lungs , -points which were discussed in the last chapter under two headings . Nevertheless , I will here consider in some detail several of the cases advanced by Mr. Mivart , selecting those which are the most ...
... swim - bladder into lungs , -points which were discussed in the last chapter under two headings . Nevertheless , I will here consider in some detail several of the cases advanced by Mr. Mivart , selecting those which are the most ...
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Términos y frases comunes
adapted advantage allied analogous appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin origin of species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young