On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 |
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Página 9
... bird has been crossed with nine dis- tinct species of finches , but , as not one of these breeds . freely in confinement , we have no right to expect that the first crosses between them and the canary , or that their hybrids , should be ...
... bird has been crossed with nine dis- tinct species of finches , but , as not one of these breeds . freely in confinement , we have no right to expect that the first crosses between them and the canary , or that their hybrids , should be ...
Página 10
... birds he raised no less than eight hybrids ( grandchildren of the pure geese ) from one nest . In India , however , these cross - bred geese must be far more fertile ; for I am assured by two eminently capable judges , namely Mr. Blyth ...
... birds he raised no less than eight hybrids ( grandchildren of the pure geese ) from one nest . In India , however , these cross - bred geese must be far more fertile ; for I am assured by two eminently capable judges , namely Mr. Blyth ...
Página 78
... birds their front limbs in this precise intermediate state of " neither true arms nor true 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 ...
... birds their front limbs in this precise intermediate state of " neither true arms nor true 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 ...
Página 79
... bird - like animals , some of gigantic size , existed during that period ? Not a fragment of bone has been discovered in these beds . Not long ago , palæontologists maintained that the whole class of birds came suddenly into existence ...
... bird - like animals , some of gigantic size , existed during that period ? Not a fragment of bone has been discovered in these beds . Not long ago , palæontologists maintained that the whole class of birds came suddenly into existence ...
Página 80
... bird , the Archeopteryx , with a long lizard - like tail , bearing a pair of feathers on each joint , and with its wings furnished with two free claws , has been discovered in the oolitic slates of Solenhofen . Hardly any recent ...
... bird , the Archeopteryx , with a long lizard - like tail , bearing a pair of feathers on each joint , and with its wings furnished with two free claws , has been discovered in the oolitic slates of Solenhofen . Hardly any recent ...
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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