The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 100
Page xxiv
... known French botanist , M. Lecoq , writes in 1854 ( Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espèce , nous conduisent directement aux idées palæontologist ...
... known French botanist , M. Lecoq , writes in 1854 ( Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espèce , nous conduisent directement aux idées palæontologist ...
Page 16
... known to ap- pear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and that , when there is no apparent reason why a peculiarity should ...
... known to ap- pear at the corresponding caterpillar or cocoon stage . But hereditary diseases and some other facts make me believe that the rule has a wider extension , and that , when there is no apparent reason why a peculiarity should ...
Page 21
... known facts , come to the conclusion that several wild species of Canidæ have been tamed , and that their blood , in some cases mingled together , flows in the veins of our do- mestic breeds . In regard to sheep and goats I can form no ...
... known facts , come to the conclusion that several wild species of Canidæ have been tamed , and that their blood , in some cases mingled together , flows in the veins of our do- mestic breeds . In regard to sheep and goats I can form no ...
Page 27
... known ; and these have not any of the characters of the domestic breeds . Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and ...
... known ; and these have not any of the characters of the domestic breeds . Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and ...
Page 29
... known principle of reversion to ancestral characters , if all the domestic breeds are descended from the rock - pigeon . But if we deny this , we must make one of the two following highly improbable suppositions . Either , first , that ...
... known principle of reversion to ancestral characters , if all the domestic breeds are descended from the rock - pigeon . But if we deny this , we must make one of the two following highly improbable suppositions . Either , first , that ...
Other editions - View all
Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young