The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
Dentro del libro
Resultados 1-3 de 16
Página 22
... advantage or indirectly give any advantage to the other individuals of the same variety , thus leading to their preservation . But it would be superfluous to discuss this question in detail ; for with plants we have conclusive evidence ...
... advantage or indirectly give any advantage to the other individuals of the same variety , thus leading to their preservation . But it would be superfluous to discuss this question in detail ; for with plants we have conclusive evidence ...
Página 78
... advantage over other organisms , a comparatively short time would be necessary to produce many divergent forms , which would spread rapidly and widely , throughout the world . Professor Pictet , in his excellent Review of this work , in ...
... advantage over other organisms , a comparatively short time would be necessary to produce many divergent forms , which would spread rapidly and widely , throughout the world . Professor Pictet , in his excellent Review of this work , in ...
Página 103
... advantage over older forms ; and the forms , which are already dominant , or have some advantage over the other forms in their own country , give birth to the greatest number of new varieties or incipient species . We have distinct ...
... advantage over older forms ; and the forms , which are already dominant , or have some advantage over the other forms in their own country , give birth to the greatest number of new varieties or incipient species . We have distinct ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
Otras 2 secciones no mostradas
Otras ediciones - Ver todas
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