The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for Life |
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Page xv
... certain characters alone . After remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes , firstly , that all animals tend to vary in some degree , and , secondly , that agriculturists improve ...
... certain characters alone . After remarking that negroes and mulattoes enjoy an immunity from certain tropical diseases , he observes , firstly , that all animals tend to vary in some degree , and , secondly , that agriculturists improve ...
Page 2
... certain trees , which has seeds that must be transported by certain birds , and which has flowers with separate sexes absolutely requiring the agency of certain insects to bring pollen from one flower to the other , it is equally ...
... certain trees , which has seeds that must be transported by certain birds , and which has flowers with separate sexes absolutely requiring the agency of certain insects to bring pollen from one flower to the other , it is equally ...
Page 13
... certain that they are descended from a different aboriginal stock from our European cattle ; and some competent judges believe that these latter have had two or three wild progenitors , -whether or not these deserve to be called species ...
... certain that they are descended from a different aboriginal stock from our European cattle ; and some competent judges believe that these latter have had two or three wild progenitors , -whether or not these deserve to be called species ...
Page 21
... certain direc- tions useful to him . In this sense he may be said to have made for himself useful breeds . The great power of this principle of selection is not hypotheti- cal . It is certain that several of our eminent breeders have ...
... certain direc- tions useful to him . In this sense he may be said to have made for himself useful breeds . The great power of this principle of selection is not hypotheti- cal . It is certain that several of our eminent breeders have ...
Page 23
... certain size was ordered , and this may be compared to the " roguing " of plants by nurserymen . The principle of selection I find distinctly given in an ancient Chinese encyclopædia . Explicit rules are laid down by some of the Roman ...
... certain size was ordered , and this may be compared to the " roguing " of plants by nurserymen . The principle of selection I find distinctly given in an ancient Chinese encyclopædia . Explicit rules are laid down by some of the Roman ...
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Common terms and phrases
accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young