The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538ÆäÀÌÁö |
µµ¼ º»¹®¿¡¼
62°³ÀÇ °á°ú Áß 1 - 3°³
84 ÆäÀÌÁö
... kind . This is rather an extreme estimate for most of the higher animals , but by no means so for many of the lower organ- isms . He then shows that if a single individual were born , which varied in some manner , giving it twice as ...
... kind . This is rather an extreme estimate for most of the higher animals , but by no means so for many of the lower organ- isms . He then shows that if a single individual were born , which varied in some manner , giving it twice as ...
191 ÆäÀÌÁö
... kind open and colored so as to attract insects ; the other closed , not colored , destitute of nectar , and never visited by insects . Hence , we may conclude that , if insects had not been de- veloped on the face of the earth , our ...
... kind open and colored so as to attract insects ; the other closed , not colored , destitute of nectar , and never visited by insects . Hence , we may conclude that , if insects had not been de- veloped on the face of the earth , our ...
233 ÆäÀÌÁö
... kind would be found to be far from uncommon with plants which did not climb , and that this had afforded the basis for natural selection to work on and improve . When I made this pre- diction , I knew of only one imperfect case , namely ...
... kind would be found to be far from uncommon with plants which did not climb , and that this had afforded the basis for natural selection to work on and improve . When I made this pre- diction , I knew of only one imperfect case , namely ...
±âŸ ÃâÆǺ» - ¸ðµÎ º¸±â
ÀÚÁÖ ³ª¿À´Â ´Ü¾î ¹× ±¸¹®
adapted admit affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species divergence domestic doubt effects eggs embryo existing extinct extremely facts favorable fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamell©¡ larv©¡ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organs parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive suppose tend theory tion variability variations varieties vary whole widely different wings young