The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1권D. Appleton, 1898 |
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9 페이지
... probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which variably fol- low from the insertion of a minute drop of poison by a gall - producing insect , show us what singular ...
... probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which variably fol- low from the insertion of a minute drop of poison by a gall - producing insect , show us what singular ...
13 페이지
... probably entail changes in the mature animal . In monstrosities , the correlations between quite distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders ...
... probably entail changes in the mature animal . In monstrosities , the correlations between quite distinct parts are very curious ; and many instances are given in Isidore Geoffroy St. Hilaire's great work on this subject . Breeders ...
21 페이지
... probably for ever remain vague . But I may here state , that , looking to the domestic dogs of the whole world , I have , after a laborious collection of all known facts , come to the conclusion that several wild species of Canidæ have ...
... probably for ever remain vague . But I may here state , that , looking to the domestic dogs of the whole world , I have , after a laborious collection of all known facts , come to the conclusion that several wild species of Canidæ have ...
30 페이지
... probably quite correct , if applied to species closely related to each other . But to extend it so far as to suppose that species , aborigi- nally as distinct as carriers , tumblers , pouters , and fan- tails now are , should yield ...
... probably quite correct , if applied to species closely related to each other . But to extend it so far as to suppose that species , aborigi- nally as distinct as carriers , tumblers , pouters , and fan- tails now are , should yield ...
34 페이지
... probably arisen suddenly , or by one step ; many botanists , for instance , believe that the fuller's teasel , with its hooks , which cannot be rivalled by any mechanical contrivance , is only a variety of the wild Dipsacus ; and this ...
... probably arisen suddenly , or by one step ; many botanists , for instance , believe that the fuller's teasel , with its hooks , which cannot be rivalled by any mechanical contrivance , is only a variety of the wild Dipsacus ; and this ...
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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 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 increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young