The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, Volumes 1-2D. Appleton, 1917 - Evolution |
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Page 193
... common to large groups ; but in certain genera the neuration differs in the different species , and likewise in the ... common progenitor , as have the two sexes of any one species . Consequently , whatever part of the structure of the ...
... common to large groups ; but in certain genera the neuration differs in the different species , and likewise in the ... common progenitor , as have the two sexes of any one species . Consequently , whatever part of the structure of the ...
Page 238
... common to inheritance from a common pro- genitor . Fritz Müller , in order to test the conclusions arrived at in this volume , has followed out with much care a nearly similar line of argument . Several families of crustaceans include a ...
... common to inheritance from a common pro- genitor . Fritz Müller , in order to test the conclusions arrived at in this volume , has followed out with much care a nearly similar line of argument . Several families of crustaceans include a ...
Page 288
... common duck ; but I do not know whether they use their beaks for sifting the water . 66 Turning to another group of the same family . In the Egyptian goose ( Chenalopex ) the beak closely re- sembles that of the common duck ; but the ...
... common duck ; but I do not know whether they use their beaks for sifting the water . 66 Turning to another group of the same family . In the Egyptian goose ( Chenalopex ) the beak closely re- sembles that of the common duck ; but the ...
Contents
VARIATION UNDER DOMESTICATION | 7 |
CHAPTER II | 51 |
STRUGGLE FOR EXISTENCE | 66 |
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Common terms and phrases
adapted affinity allied species ancient animals appear Archipelago beak become believe belonging birds breeds Cambrian cause characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo Europe existing extinct extremely facts favourable fertilised fertility fish flowers formation formerly forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly occur oceanic islands offspring organisation parent peculiar perfect pigeon pistil plants pollen present probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance seeds Silurian slight South America stage stamens sterility structure successive suppose theory tion variability variations varieties vary whilst whole widely different wings