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 47
Página 57
... occur until after long intervals , due to the occur- rence of physical changes of some kind , or through the immigration of new forms . Moreover variations or individual differences of the right nature , by which some of the inhabitants ...
... occur until after long intervals , due to the occur- rence of physical changes of some kind , or through the immigration of new forms . Moreover variations or individual differences of the right nature , by which some of the inhabitants ...
Página 101
... occur in the formations either above or below , occur in the same order at these distant points of the world . In the several successive palæo- zoic formations of Russia , Western Europe , and North America , a similar parallelism in ...
... occur in the formations either above or below , occur in the same order at these distant points of the world . In the several successive palæo- zoic formations of Russia , Western Europe , and North America , a similar parallelism in ...
Página 161
... occurred about 240,000 years ago , and endured with slight alterations of climate for about 160,000 years . With respect ... occur . On the Organ mountains of Brazil , some few temperate European , some Antarctic , and some Andean genera ...
... occurred about 240,000 years ago , and endured with slight alterations of climate for about 160,000 years . With respect ... occur . On the Organ mountains of Brazil , some few temperate European , some Antarctic , and some Andean genera ...
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