The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1896 |
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... varieties at the present day - On the nature of extinct intermediate varieties ; on their number -On the lapse of time , as inferred from the rate of denudation and of deposition - On the lapse of time as estimated by years -On the ...
... varieties at the present day - On the nature of extinct intermediate varieties ; on their number -On the lapse of time , as inferred from the rate of denudation and of deposition - On the lapse of time as estimated by years -On the ...
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... varieties- Descent always used in classification - Analogical or adaptive characters - Affinities , general , complex , and radiating - Ex- tinction separates and defines groups - MORPHOLOGY , between members of the same class , between ...
... varieties- Descent always used in classification - Analogical or adaptive characters - Affinities , general , complex , and radiating - Ex- tinction separates and defines groups - MORPHOLOGY , between members of the same class , between ...
1 페이지
... varieties when crossed and of their mongrel offspring not uni- versal - Hybrids and mongrels compared independently of their fertility - Summary . THE view commonly entertained by naturalists is that species , when intercrossed , have ...
... varieties when crossed and of their mongrel offspring not uni- versal - Hybrids and mongrels compared independently of their fertility - Summary . THE view commonly entertained by naturalists is that species , when intercrossed , have ...
2 페이지
... varieties , that is of the forms known or believed to be descended from common parents , when crossed , and likewise the fertility of their mongrel offspring , is , with reference to my theory , of equal importance with the sterility of ...
... varieties , that is of the forms known or believed to be descended from common parents , when crossed , and likewise the fertility of their mongrel offspring , is , with reference to my theory , of equal importance with the sterility of ...
3 페이지
... varieties . Gärtner , also , makes the rule equally universal ; and he disputes the entire fertility of Kölreuter's ten cases . But in these and in many other cases , Gärtner is obliged carefully to count the seeds , in order to show ...
... varieties . Gärtner , also , makes the rule equally universal ; and he disputes the entire fertility of Kölreuter's ten cases . But in these and in many other cases , Gärtner is obliged carefully to count the seeds , in order to show ...
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accumulated adapted admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation palæontologists paleozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings