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 15
... given . Thuret has observed the same fact with certain sea - weeds or Fuci . Gärtner , moreover , found that this difference of facility in making reciprocal crosses is extremely common in a lesser degree . He has observed it even ...
... given . Thuret has observed the same fact with certain sea - weeds or Fuci . Gärtner , moreover , found that this difference of facility in making reciprocal crosses is extremely common in a lesser degree . He has observed it even ...
Página 163
... given , as I am informed by Dr. Hooker , of European genera , found in Australia , but not in the intermediate torrid regions . In the admirable Introduction to the Flora of New Zealand , ' by Dr. Hooker , analogous and striking facts ...
... given , as I am informed by Dr. Hooker , of European genera , found in Australia , but not in the intermediate torrid regions . In the admirable Introduction to the Flora of New Zealand , ' by Dr. Hooker , analogous and striking facts ...
Página 312
... given geological pe : iod . FLORETS . - Flowers imperfectly developed in some respects , and collected into a dense spike or head , as in the Grasses , the Dandelion , & c . FETAL . Of or belonging to the factus , or embryo in course of ...
... given geological pe : iod . FLORETS . - Flowers imperfectly developed in some respects , and collected into a dense spike or head , as in the Grasses , the Dandelion , & c . FETAL . Of or belonging to the factus , or embryo in course of ...
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