Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página x
... flowers— Variations of domestic animals - Domestic pigeons - Acclimatisation -Circumstances favourable to selection by man - Conditions favour- able to variation - Concluding remarks 83-101 } CHAPTER V NATURAL SELECTION BY VARIATION AND ...
... flowers— Variations of domestic animals - Domestic pigeons - Acclimatisation -Circumstances favourable to selection by man - Conditions favour- able to variation - Concluding remarks 83-101 } CHAPTER V NATURAL SELECTION BY VARIATION AND ...
Página xii
... nuts - Edible or attractive fruits - The colours of flowers - Modes of securing cross - fertilisation - The interpretation of the facts - Summary of additional facts bearing on insect fertilisation - Fertilisation of xii CONTENTS.
... nuts - Edible or attractive fruits - The colours of flowers - Modes of securing cross - fertilisation - The interpretation of the facts - Summary of additional facts bearing on insect fertilisation - Fertilisation of xii CONTENTS.
Página xiii
... flowers by birds - Self - fertilisation of flowers - Difficulties and con- tradictions — Intercrossing not necessarily advantageous — Supposed evil results of close interbreeding - How the struggle for existence acts among flowers - Flowers ...
... flowers by birds - Self - fertilisation of flowers - Difficulties and con- tradictions — Intercrossing not necessarily advantageous — Supposed evil results of close interbreeding - How the struggle for existence acts among flowers - Flowers ...
Página 1
... Flowers . 157 18. GAZELLA SOMMERRINGI ( to show recognition marks ) • 19. RECOGNITION MARKS OF AFRICAN PLOVERS ( from Seebohm's 219 Charadriado • 221 produce fertile individuals , and which reproduce themselves by generation.
... Flowers . 157 18. GAZELLA SOMMERRINGI ( to show recognition marks ) • 19. RECOGNITION MARKS OF AFRICAN PLOVERS ( from Seebohm's 219 Charadriado • 221 produce fertile individuals , and which reproduce themselves by generation.
Página 11
... flower and seed earlier in a wet autumn ; plants best armed with spines or hairs may escape being devoured ; those whose flowers are most conspicuous may be soonest fertilised by insects . We cannot doubt that , on the whole , any ...
... flower and seed earlier in a wet autumn ; plants best armed with spines or hairs may escape being devoured ; those whose flowers are most conspicuous may be soonest fertilised by insects . We cannot doubt that , on the whole , any ...
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