The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
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Página 242
... larva to its conditions of life is just as perfect and as beautiful as in the adult animal . In how important a manner this has acted , has recently been well shown by Sir J. Lubbock in his remarks on the close similarity of the larvae ...
... larva to its conditions of life is just as perfect and as beautiful as in the adult animal . In how important a manner this has acted , has recently been well shown by Sir J. Lubbock in his remarks on the close similarity of the larvae ...
Página 251
... larvæ might be rendered by natural selection more and more different from their parents to any conceivable extent . Differences in the larva might , also , become correlated with successive stages of its development ; so that the larva ...
... larvæ might be rendered by natural selection more and more different from their parents to any conceivable extent . Differences in the larva might , also , become correlated with successive stages of its development ; so that the larva ...
Página 254
... larvæ state to some special line of life , and transmitted the same larval state to a whole group of descendants ; for such larval will not resemble any still more ancient form in its adult state . Thus , as it seems to me , the leading ...
... larvæ state to some special line of life , and transmitted the same larval state to a whole group of descendants ; for such larval will not resemble any still more ancient form in its adult state . Thus , as it seems to me , the leading ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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Términos y frases comunes
accumulated adapted admit adult affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo 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 seeds Silurian slight South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings