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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xviii 페이지
... successive periods , and then re - stocked ; and he gives as an alternative , that new forms may be generated " without the presence of any mould or germ of former aggregates . " I am not sure that I understand some passages ; but it ...
... successive periods , and then re - stocked ; and he gives as an alternative , that new forms may be generated " without the presence of any mould or germ of former aggregates . " I am not sure that I understand some passages ; but it ...
4 페이지
... successive slight variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long ...
... successive slight variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long ...
33 페이지
... successive generations . May not those naturalists who , knowing far less of the laws of inheritance than does the breeder , and knowing no more than he does of the intermediate links in the long lines of descent , yet admit that many ...
... successive generations . May not those naturalists who , knowing far less of the laws of inheritance than does the breeder , and knowing no more than he does of the intermediate links in the long lines of descent , yet admit that many ...
35 페이지
... successive varia- tions ; man adds them up in certain directions useful to him . In this sense he may be said to have made for himself useful breeds . The great power of this principle of selection is not hypothetical . It is certain ...
... successive varia- tions ; man adds them up in certain directions useful to him . In this sense he may be said to have made for himself useful breeds . The great power of this principle of selection is not hypothetical . It is certain ...
36 페이지
... successive generations , of differences absolutely inappreciable by an uneducated eye - differences which I for one have vainly attempted to appreciate . Not one man in a thousand has accuracy of eye and judg- ment sufficient to become ...
... successive generations , of differences absolutely inappreciable by an uneducated eye - differences which I for one have vainly attempted to appreciate . Not one man in a thousand has accuracy of eye and judg- ment sufficient to become ...
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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