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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xv 페이지
... similar views , as shown in the Intro- duction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ( Goethe als Natur- forscher , ' von Dr. Karl Meding , s . 34 ) that the future ...
... similar views , as shown in the Intro- duction to a work written in 1794 and 1795 , but not published till long afterwards : he has pointedly remarked ( Goethe als Natur- forscher , ' von Dr. Karl Meding , s . 34 ) that the future ...
195 페이지
... similar cases of analogous variation have been observed by Naudin in the great gourd - family , and by various authors in our cereals . Similar cases occurring with insects under natural conditions have lately been discussed with much ...
... similar cases of analogous variation have been observed by Naudin in the great gourd - family , and by various authors in our cereals . Similar cases occurring with insects under natural conditions have lately been discussed with much ...
238 페이지
... similar line of argument . Several families of crustaceans include a few species , possessing an air- breathing apparatus and fitted to live out of the water . In two of these families , which were more especially examined by Müller ...
... similar line of argument . Several families of crustaceans include a few species , possessing an air- breathing apparatus and fitted to live out of the water . In two of these families , which were more especially examined by Müller ...
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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