Seite - 446 - in The Origin of Species
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Text der Seite - 446 -
446 ORIGIN OF SPECIES
and eggs of most lowly organised forms being very minute
and better fitted for distant transportal, probably accounts for
a law which has long been observed, and which has lately
been discussed by Alph. de Candolle in regard to plants,
namely, that the lower any group of organisms stands the
more widely it ranges.
The relations just discussed,—namely, lower organisms
ranging more widely than the higher,—some of the species of
widely-ranging genera themselves ranging widely,—such
facts, as alpine, lacustrine, and marsh productions being gen-
erally related to those which live on the surrounding low
lands and dry lands,—the striking relationship between the
inhabitants of islands and those of the nearest mainland—
the still closer relationship of the distinct inhabitants of the
islands in the same archipelago—are inexplicable on the ordi-
nary view of the independent creation of each species, but
are explicable if we admit colonisation from the nearest or
readiest source, together w^th the subsequent adaptation of
the colonists to their new homes.
SUMMARY OF THE LAST AND PRESENT CHAPTERS
In these chapters I have endeavoured to show, that if we
make due allowance for our ignorance of the full effects of
changes of climate and of the level of the land, which have
certainly occurred within the recent period, and of other
changes which have probably occurred,—if we remember
how ignorant we are with respect to the many curious means
of occasional transport,—if we bear in mind, and this is a
very important consideration, how often a species may have
ranged continuously over a wide area, and then have become
extinct in the intermediate tracts,—the difficulty is not insu-
perable in believing that all the individuals of the same
species, wherever found, are descended from common par-
ents. And we are led to this conclusion, which has been ar-
rivedatbymany naturalistsunderthe designationofsingle cen-
tres of creation, by various general considerations, more espe-
cially from the importance of barriers of all kinds, and from
the analogical distribution of sub-genera, genera, and families.
With respect to distinct species belonging to the same
zurĂĽck zum
Buch The Origin of Species"
The Origin of Species
- Titel
- The Origin of Species
- Autor
- Charles Darwin
- Verlag
- P. F. Collier & Son
- Ort
- New York
- Datum
- 1909
- Sprache
- englisch
- Lizenz
- PD
- Abmessungen
- 10.5 x 16.4 cm
- Seiten
- 568
- Schlagwörter
- Evolutionstheorie, Evolution, Theory of Evolution, Naturwissenschaft, Natural Sciences
- Kategorien
- International
- Naturwissenschaften Biologie
Inhaltsverzeichnis
- EDITOR'S INTRODUCTION 5
- AN HISTORICAL SKETCH of the Progress of Opinion on the Origin of Species 9
- INTRODUCTION 21
- Variation under Domestication 25
- Variation under Nature 58
- Struggle for Existence 76
- Natural Selection; or the Survival of the Fittest 93
- Laws of Variation 145
- Difficulties of the Theory 178
- Miscellaneous Objections to the Theory of Natural Selection 219
- Instinct 262
- Hybridism 298
- On the Imperfection of the Geological Record 333
- On the Geological Succession of Organic Beinss 364
- Geographical Distribution 395
- Geographical Distribution - continued 427
- Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs 450
- Recapitulation and Conclusion 499
- GLOSSARY 531
- INDEX 541