On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1888 - 458페이지 |
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viii 페이지
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - OD the lapse of time , as inferred from the rate of denudation and of deposition On the lapse of time as estimated by years ...
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - OD the lapse of time , as inferred from the rate of denudation and of deposition On the lapse of time as estimated by years ...
xx 페이지
... intermediate graduated forms . " Thus living plants and animals are not separated from the extinct by new creations , but are tc be regarded as their descendants through continued reproduction . " A well - known French botanist , M ...
... intermediate graduated forms . " Thus living plants and animals are not separated from the extinct by new creations , but are tc be regarded as their descendants through continued reproduction . " A well - known French botanist , M ...
15 페이지
... intermediate between their parents ; and if we account for our several domestic races by this process , we must admit the former existence of the most extreme forms , as the Italian grey- hound , bloodhound , bull - dog , & c . , in the ...
... intermediate between their parents ; and if we account for our several domestic races by this process , we must admit the former existence of the most extreme forms , as the Italian grey- hound , bloodhound , bull - dog , & c . , in the ...
21 페이지
... intermediate links in the long lines of descent , yet admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
... intermediate links in the long lines of descent , yet admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
35 페이지
... conspicuously distinct forms , not connected by intermediate varieties . Fritz Müller has described analogous but more extraordinary cases with the males of certain Brazilian Crustaceans : thus , СНАР . ІІ . 35 Individual Differences .
... conspicuously distinct forms , not connected by intermediate varieties . Fritz Müller has described analogous but more extraordinary cases with the males of certain Brazilian Crustaceans : thus , СНАР . ІІ . 35 Individual Differences .
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young