The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifePenguin Books, 1982 - 477 páginas |
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Página 224
... quadrupeds are actually destroyed ( except in some rare cases ) by the flies , but they are incessantly harassed and their strength reduced , so that they are more subject to disease , or not so well enabled in a coming dearth to search ...
... quadrupeds are actually destroyed ( except in some rare cases ) by the flies , but they are incessantly harassed and their strength reduced , so that they are more subject to disease , or not so well enabled in a coming dearth to search ...
Página 349
... quadrupeds . But if the same species can be produced at two separate points , why do we not find a single mammal common to Europe and Australia or South America ? The conditions of life are nearly the same , so that a multitude of ...
... quadrupeds . But if the same species can be produced at two separate points , why do we not find a single mammal common to Europe and Australia or South America ? The conditions of life are nearly the same , so that a multitude of ...
Página 467
... Quadrupeds , characterised by the ab- sence of at least the middle incisor ( front ) teeth in both jaws . ( Examples , the Sloths and Armadillos . ) Elytra : The hardened fore - wings of Beetles , serving as sheaths for the membranous ...
... Quadrupeds , characterised by the ab- sence of at least the middle incisor ( front ) teeth in both jaws . ( Examples , the Sloths and Armadillos . ) Elytra : The hardened fore - wings of Beetles , serving as sheaths for the membranous ...
Contenido
EDITORS INTRODUCTION | 11 |
NOTE ON THIS EDITION | 49 |
INTRODUCTION | 65 |
Derechos de autor | |
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Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or the Preservation of ... Charles Darwin Vista previa limitada - 1982 |
The Origin of Species by Means of Natural Selection: Or, the Preservation of ... Charles Darwin Sin vista previa disponible - 2014 |
Términos y frases comunes
accumulated adapted affinities allied species America ancient animals appear become bees believe birds breeds cause cells chapter characters cirripedes climate closely allied colour continuous crossed crustaceans Darwin degree developed difficulty distinct species domestic doubt eggs embryo Europe existence exterminated extinct extremely facts favourable fertility flowers formation forms fossil genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvae less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest offspring organisation organs Origin Origin of Species palaeozoic perfect pigeons pistil plants pollen present principle probably produced progenitor quadrupeds ranked remarked reproductive resemblance rudimentary seeds seems sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion trees variability variations varieties vary whole widely wings