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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Charles Darwin. Geometrical Ratio of Increase : A struggle for existence inevitably follows from the high rate at which all organic beings tend to increase . Every being , which during its natural lifetime produces several eggs or seeds ...
Charles Darwin. Geometrical Ratio of Increase : A struggle for existence inevitably follows from the high rate at which all organic beings tend to increase . Every being , which during its natural lifetime produces several eggs or seeds ...
81 페이지
... increase , the result of which never fails to be surprising , simply explains their ex- traordinarily rapid increase and wide diffusion in their new homes . In a state of nature almost every full - grown plant annually produces seed ...
... increase , the result of which never fails to be surprising , simply explains their ex- traordinarily rapid increase and wide diffusion in their new homes . In a state of nature almost every full - grown plant annually produces seed ...
83 페이지
... increase are most obscure . Look at the most vigorous species ; by as much as it swarms in numbers , by so much will it tend to increase still further . We know not exactly what the checks are even in a single instance . Nor will this ...
... increase are most obscure . Look at the most vigorous species ; by as much as it swarms in numbers , by so much will it tend to increase still further . We know not exactly what the checks are even in a single instance . Nor will this ...
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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