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 258
... Rudimentary organs in the individuals of the same . species are very liable to vary in the degree of their development and in other respects . In closely allied species , also , the extent to which the same organ has been reduced ...
... Rudimentary organs in the individuals of the same . species are very liable to vary in the degree of their development and in other respects . In closely allied species , also , the extent to which the same organ has been reduced ...
Página 259
... rudimentary , or even cannot be said to be in any degree rudimentary . Hence rudimentary organs in the adult are often said to have . retained their embryonic condition . I have now given the leading facts with respect to rudimentary organs ...
... rudimentary , or even cannot be said to be in any degree rudimentary . Hence rudimentary organs in the adult are often said to have . retained their embryonic condition . I have now given the leading facts with respect to rudimentary organs ...
Página 260
... rudimentary organs , by supposing that they serve to excrete matter in excess , or matter injurious to the system ; but can we suppose that the minute papilla , which often represents the pistil in male flowers , and which is formed of ...
... rudimentary organs , by supposing that they serve to excrete matter in excess , or matter injurious to the system ; but can we suppose that the minute papilla , which often represents the pistil in male flowers , and which is formed of ...
Página 261
... rudiments of various parts in monsters ; but I doubt whether any of these cases throw light on the origin of rudimentary organs in a state of nature , further than by showing that rudiments can be pro- duced ; for the balance of ...
... rudiments of various parts in monsters ; but I doubt whether any of these cases throw light on the origin of rudimentary organs in a state of nature , further than by showing that rudiments can be pro- duced ; for the balance of ...
Página 262
... organ in its reduced state at the same mature age , but will seldom effect it in the embryo . Thus we can un- derstand the greater size of rudimentary organs in the embryo relatively to the adjoining parts , and their lesser relative ...
... organ in its reduced state at the same mature age , but will seldom effect it in the embryo . Thus we can un- derstand the greater size of rudimentary organs in the embryo relatively to the adjoining parts , and their lesser relative ...
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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