The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
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Página 78
... wings " ? Yet these birds hold their place victoriously in the battle for life ; for they exist in infinite numbers and of many kinds . I do not sup- pose that we here see the real transitional grades through which the wings of birds ...
... wings " ? Yet these birds hold their place victoriously in the battle for life ; for they exist in infinite numbers and of many kinds . I do not sup- pose that we here see the real transitional grades through which the wings of birds ...
Página 80
... wings furnished with two free claws , has been discovered in the oolitic slates of Solenhofen . Hardly any recent discovery shows more forcibly than this , how little we as yet know of the former inhabitants of the world . I may give ...
... wings furnished with two free claws , has been discovered in the oolitic slates of Solenhofen . Hardly any recent discovery shows more forcibly than this , how little we as yet know of the former inhabitants of the world . I may give ...
Página 208
... wings of insects are folded - mere colour in cer- tain Alga - mere pubescence on parts of the flower in grasses the nature of the dermal covering , as hair or feathers , in the Vertebrata . If the Ornithorhynchus had been covered with ...
... wings of insects are folded - mere colour in cer- tain Alga - mere pubescence on parts of the flower in grasses the nature of the dermal covering , as hair or feathers , in the Vertebrata . If the Ornithorhynchus had been covered with ...
Página 217
... wing is folded , whether the skin be covered by hair or feathers - if it prevail throughout many and different species , especially those having very different habits of life , it assumes high value ; for we can account for its presence ...
... wing is folded , whether the skin be covered by hair or feathers - if it prevail throughout many and different species , especially those having very different habits of life , it assumes high value ; for we can account for its presence ...
Página 222
... wings , that Mr. Bates , with his eyes sharpened by collecting during eleven years , was , though always on his guard , continu- ally deceived . When the mockers and the mocked are caught and compared , they are found to be very differ ...
... wings , that Mr. Bates , with his eyes sharpened by collecting during eleven years , was , though always on his guard , continu- ally deceived . When the mockers and the mocked are caught and compared , they are found to be very differ ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings