Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página xi
... eggs - Colour as a means of recognition - Summary of the preceding exposition — Influence of locality or of climate on colour— Concluding remarks 187-231 CHAPTER IX WARNING COLORATION AND MIMICRY The skunk as an CONTENTS xi.
... eggs - Colour as a means of recognition - Summary of the preceding exposition — Influence of locality or of climate on colour— Concluding remarks 187-231 CHAPTER IX WARNING COLORATION AND MIMICRY The skunk as an CONTENTS xi.
Página 16
... eggs or the very young that suffer most from their various enemies ; in plants , the tender seedlings . when they first appear above the ground . To illustrate this latter point Mr. Darwin cleared and dug a piece of ground three feet ...
... eggs or the very young that suffer most from their various enemies ; in plants , the tender seedlings . when they first appear above the ground . To illustrate this latter point Mr. Darwin cleared and dug a piece of ground three feet ...
Página 19
... eggs in the navels of these animals when first born . The increase of these flies , numerous as they are , must be habitually checked by some means , probably by other parasitic insects . Hence , if certain insectivorous birds were to ...
... eggs in the navels of these animals when first born . The increase of these flies , numerous as they are , must be habitually checked by some means , probably by other parasitic insects . Hence , if certain insectivorous birds were to ...
Página 25
... four common titmice , the thrush , and the blackbird , stay with us all the year round . These lay on an average six eggs , but , as several of them have two or more broods a year , ten will be II 25 THE STRUGGLE FOR EXISTENCE.
... four common titmice , the thrush , and the blackbird , stay with us all the year round . These lay on an average six eggs , but , as several of them have two or more broods a year , ten will be II 25 THE STRUGGLE FOR EXISTENCE.
Página 26
... eggs as possible birds , must annually die or be destroyed . Yet we see nothing , or almost nothing , of this tremendous slaughter of the innocents going on all around us . In severe winters a few birds are found dead , and a few ...
... eggs as possible birds , must annually die or be destroyed . Yet we see nothing , or almost nothing , of this tremendous slaughter of the innocents going on all around us . In severe winters a few birds are found dead , and a few ...
Outras edições - Ver tudo
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection ..., Volumes 1-2 Alfred Russel Wallace Visualização integral - 1889 |
Palavras e frases frequentes
abundant adapted adduced allied species America amount animals and plants appears birds breed brilliant butterflies cause characters climate closely allied colours of animals common concealment conspicuous continued cross-fertilisation crossed curious Darwin dicotyledons distinct species domestic animals effects eggs enemies Eocene evidence extinct facts faculty favourable female fertile fertilised flowers genera genus geological groups habits hybrids important increase individuals infertility inhabit insects intercrossing kind larva larvæ less living male mammalia mammals markings marsupials mimicry Miocene mode modified moths natural selection naturalists nests occur offspring organs Origin of Species peculiar pigeons Pliocene pollen portion possess probably produced Professor protectively coloured pupa regions remarkable resemblance seeds self-fertilisation Silurian similar specimens spots sterility structure struggle for existence supposed tail theory tints tion toes trees tropical usually variability variation varied varieties vegetation warning colours whole wild wings Zealand