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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... given in a bill of fare in the previous dynasty . In the time of the Romans , as we hear from Pliny , immense prices were given for pigeons ; " nay , they are come to this pass , that they can reckon up their pedigree and race ...
... given in a bill of fare in the previous dynasty . In the time of the Romans , as we hear from Pliny , immense prices were given for pigeons ; " nay , they are come to this pass , that they can reckon up their pedigree and race ...
36 ÆäÀÌÁö
... given it existence . " In Saxony the im- portance of the principle of selection in regard to merino sheep is so fully recognised , that men follow it as a trade : the sheep are placed on a table and are studied , like a picture by a ...
... given it existence . " In Saxony the im- portance of the principle of selection in regard to merino sheep is so fully recognised , that men follow it as a trade : the sheep are placed on a table and are studied , like a picture by a ...
220 ÆäÀÌÁö
... given : I have often watched a tyrant flycatcher ( Saurophagus sulphuratus ) in South America , hovering over one spot and then proceeding to another , like a kestrel , and at other times standing stationary on the margin of water , and ...
... given : I have often watched a tyrant flycatcher ( Saurophagus sulphuratus ) in South America , hovering over one spot and then proceeding to another , like a kestrel , and at other times standing stationary on the margin of water , and ...
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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