On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Página 41
... all those in the larger genera ( i.e. , those genera in each including many
species ) being placed on one side , and all those in the country vary more
frequently than the smaller genera on the other side , the former will be found to
include a ...
... all those in the larger genera ( i.e. , those genera in each including many
species ) being placed on one side , and all those in the country vary more
frequently than the smaller genera on the other side , the former will be found to
include a ...
Página 42
To test the truth of this anticipation I have arranged the plants of twelve countries ,
and the coleopterous insects of two districts , into two nearly equal masses , the
species of the larger genera on one side , and those of the smaller genera on ...
To test the truth of this anticipation I have arranged the plants of twelve countries ,
and the coleopterous insects of two districts , into two nearly equal masses , the
species of the larger genera on one side , and those of the smaller genera on ...
Página 322
It must not be forgotten that , on our theory , all the species of the same genus are
the descendants of some one species ; so that , if six genera , each having eight
species , be found in one geological formation , and in a succeeding formation ...
It must not be forgotten that , on our theory , all the species of the same genus are
the descendants of some one species ; so that , if six genera , each having eight
species , be found in one geological formation , and in a succeeding formation ...
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Contenido
Chapter Five | 106 |
DIFFICULTIES OF THE THEORY | 135 |
MISCELLANEOUS OBJECTIONS | 172 |
Derechos de autor | |
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Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or, The ..., Volumen2 Charles Darwin Vista de fragmentos - 1972 |
The Origin of Species by Means of Natural Selection: Or, The ..., Volumen1 Charles Darwin Vista de fragmentos - 1972 |
Términos y frases comunes
according action adapted admit advantage allied America amount animals appear become believe belonging birds breeds called cause certain characters climate closely colour common complex considered continuous crossed descendants developed difficulty distinct domestic doubt effects existing extinct extremely fact families favourable fertility flowers follow formation forms genera genus geological give given groups habits hand Hence hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kind known laws less living look male manner means modified namely natural selection naturalists nearly observed occasionally occur offspring organs origin parent perfect period plants points present preserved principle probably produced ranked reason remarked resemblance respect seeds seems seen separated shown similar single slight sometimes species stage sterility structure successive supposed tend theory variability variations varieties various vary whole widely young