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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xvii 페이지
... produced , chiefly by intercrossing , but likewise by variation , all our existing species . In 1826 Professor Grant , in the concluding para- graph in his well - known paper ( Edinburgh Philosophi- cal Journal , ' vol . xiv . p . 283 ) ...
... produced , chiefly by intercrossing , but likewise by variation , all our existing species . In 1826 Professor Grant , in the concluding para- graph in his well - known paper ( Edinburgh Philosophi- cal Journal , ' vol . xiv . p . 283 ) ...
xix 페이지
... produced by the conditions of life are gradual . He argues with much force on general grounds that species are not immutable productions . But I can- not see how the two supposed " impulses " account in a scientific sense for the ...
... produced by the conditions of life are gradual . He argues with much force on general grounds that species are not immutable productions . But I can- not see how the two supposed " impulses " account in a scientific sense for the ...
xx 페이지
... produced by descent with modification than that they have been separately created : the author first promulgated this opinion in 1831 . Professor Owen , in 1849 ( Nature of Limbs , ' p . 86 ) , wrote as follows : - " The archetypal idea ...
... produced by descent with modification than that they have been separately created : the author first promulgated this opinion in 1831 . Professor Owen , in 1849 ( Nature of Limbs , ' p . 86 ) , wrote as follows : - " The archetypal idea ...
xxiv 페이지
... produced . I may add , that of the thirty - four authors named in this Historical Sketch , who believe in the modification of species , or at least disbelieve in separate acts of creation , twenty - seven have written on special ...
... produced . I may add , that of the thirty - four authors named in this Historical Sketch , who believe in the modification of species , or at least disbelieve in separate acts of creation , twenty - seven have written on special ...
9 페이지
... producing insect , show us what singular modifica- tions might result in the case of plants from a chemical change in the nature of the sap . Indefinite variability is a much more common result of changed conditions than definite ...
... producing insect , show us what singular modifica- tions might result in the case of plants from a chemical change in the nature of the sap . Indefinite variability is a much more common result of changed conditions than definite ...
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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