The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for LifeWerner Company, Book Manufacturers, 1900 - 538페이지 |
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121 페이지
... shown to be the case with the barberry ; and in this very genus , which seems to have a special contrivance for self - fertilisation , it is well - known that , if closely - allied forms or varieties are planted near each other , it is ...
... shown to be the case with the barberry ; and in this very genus , which seems to have a special contrivance for self - fertilisation , it is well - known that , if closely - allied forms or varieties are planted near each other , it is ...
159 페이지
... shown that those species which spread widely , tend generally to spread very widely ; consequently , they will tend to supplant and exterminate several species in several areas , and thus check the inordinate increase of specific forms ...
... shown that those species which spread widely , tend generally to spread very widely ; consequently , they will tend to supplant and exterminate several species in several areas , and thus check the inordinate increase of specific forms ...
321 페이지
... shown that this does sometimes happen - then the resemblance between what originally was a habit and an instinct becomes so close as not to be distinguished . If Mozart , instead of playing the pianoforte at three years old with ...
... shown that this does sometimes happen - then the resemblance between what originally was a habit and an instinct becomes so close as not to be distinguished . If Mozart , instead of playing the pianoforte at three years old with ...
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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 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 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