The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for LifeWerner Company, Book Manufacturers, 1900 - 538ÆäÀÌÁö |
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14 ÆäÀÌÁö
... structure , owing to the mysterious laws of correlation . The results of the various , unknown , or but dimly understood laws of variation are infinitely complex and diversified . It is well worth while carefully to study the several ...
... structure , owing to the mysterious laws of correlation . The results of the various , unknown , or but dimly understood laws of variation are infinitely complex and diversified . It is well worth while carefully to study the several ...
217 ÆäÀÌÁö
... structure of each squirrel is the best that it is possible to conceive under all possible conditions . Let the climate and vege- tation change , let other competing rodents or new beasts of prey immigrate , or old ones become modified ...
... structure of each squirrel is the best that it is possible to conceive under all possible conditions . Let the climate and vege- tation change , let other competing rodents or new beasts of prey immigrate , or old ones become modified ...
219 ÆäÀÌÁö
... structure in a fossil condition will always be less , from their hav- ing existed in lesser numbers , than in the case of species with fully developed structures . I will now give two or three instances both of diver- sified and of ...
... structure in a fossil condition will always be less , from their hav- ing existed in lesser numbers , than in the case of species with fully developed structures . I will now give two or three instances both of diver- sified and of ...
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adapted advantage allied 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 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 improved increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamell©¡ large number larger genera larv©¡ 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 Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young