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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15 페이지
... inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of the same species , or in dif- ferent species , is sometimes inherited and ...
... inheritance as the anomaly . The laws governing inheritance are for the most part unknown . No one can say why the same peculiarity in different individuals of the same species , or in dif- ferent species , is sometimes inherited and ...
168 페이지
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of operations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of operations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
194 페이지
... inherited much in common , —to parts which have recently and largely varied being more likely still to go on varying than parts which have long been inherited and have not varied - to natural selection hav- ing more or less completely ...
... inherited much in common , —to parts which have recently and largely varied being more likely still to go on varying than parts which have long been inherited and have not varied - to natural selection hav- ing more or less completely ...
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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