The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life, Том 1John Murray, 1888 - Всего страниц: 458 |
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Стр. vii
... Gradations of structure with changed functions- Widely different organs in members of the same class , developed from one and the some source Reasons for die CHAPTER VIII . INSTINCT . Instincts comparable with habits ,
... Gradations of structure with changed functions- Widely different organs in members of the same class , developed from one and the some source Reasons for die CHAPTER VIII . INSTINCT . Instincts comparable with habits ,
Стр. x
... Gradations of character , often accom- panied by changes of function , are likewise here incidentally considered . The statement with respect to young cuckoos ejecting their foster - brothers confirmed . On the cuckoo - like habits of ...
... Gradations of character , often accom- panied by changes of function , are likewise here incidentally considered . The statement with respect to young cuckoos ejecting their foster - brothers confirmed . On the cuckoo - like habits of ...
Стр. 55
... not now connected by intermediate gradations , it is probable that they were once thus connected . Mr. Wallace , for instance , describes a certain butterfly which presents in the same island CHAP . II . ] 55 INDIVIDUAL DIFFERENCES .
... not now connected by intermediate gradations , it is probable that they were once thus connected . Mr. Wallace , for instance , describes a certain butterfly which presents in the same island CHAP . II . ] 55 INDIVIDUAL DIFFERENCES .
Стр. 56
... gradations , that naturalists do not like to rank them as distinct species , are in several respects the most important for us . We have every reason to believe that many of these doubtful and closely allied forms have permanently ...
... gradations , that naturalists do not like to rank them as distinct species , are in several respects the most important for us . We have every reason to believe that many of these doubtful and closely allied forms have permanently ...
Стр. 207
... gradations , do we not everywhere see innumerable transitional forms ? Why is not all nature in confusion , instead of the species being , as we see them , well defined ? Secondly , is it possible that an animal having , for instance ...
... gradations , do we not everywhere see innumerable transitional forms ? Why is not all nature in confusion , instead of the species being , as we see them , well defined ? Secondly , is it possible that an animal having , for instance ...
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The Origin of Species by Means of Natural Selection: Or, The ..., Том 1 Charles Darwin Полный просмотр - 1889 |
The Origin of Species by Means of Natural Selection: Or, the ..., Том 1 Charles Darwin Полный просмотр - 1898 |
Часто встречающиеся слова и выражения
acquired adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree 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 inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart 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 remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency theory tion transitional tree variability variations varieties vary widely wings young