Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página 13
... portion of which he has given us in a series of twelve masterly volumes . Proposed Mode of Treatment of the Subject . It is evidently of the most vital importance to any theory that its foundations should be absolutely secure . It is ...
... portion of which he has given us in a series of twelve masterly volumes . Proposed Mode of Treatment of the Subject . It is evidently of the most vital importance to any theory that its foundations should be absolutely secure . It is ...
Página 17
... portions of the heath had , however , been enclosed a few years before , and these en- closures were crowded with young fir - trees growing too close together for all to live ; and these were not sown or planted , nothing having been ...
... portions of the heath had , however , been enclosed a few years before , and these en- closures were crowded with young fir - trees growing too close together for all to live ; and these were not sown or planted , nothing having been ...
Página 18
... heath which had never been cultivated . After the planted portion was about twenty - five years old he observed that the change in the native vegetation ظهر was greater than is often seen in passing from 18 СНАР . DARWINISM.
... heath which had never been cultivated . After the planted portion was about twenty - five years old he observed that the change in the native vegetation ظهر was greater than is often seen in passing from 18 СНАР . DARWINISM.
Página 27
... portion of the whole . In the pampas of Buenos Ayres there were , at the end of the last century , about twelve million cows and three million horses , besides great numbers in all other parts Į · of America where open pastures offered ...
... portion of the whole . In the pampas of Buenos Ayres there were , at the end of the last century , about twelve million cows and three million horses , besides great numbers in all other parts Į · of America where open pastures offered ...
Página 28
... portion of the tropics . White clover ( Trifolium repens ) spreads over all the temperate regions of the world , and in New Zealand is exterminating many native species , including even the native flax ( Phormium 1 Still more remarkable ...
... portion of the tropics . White clover ( Trifolium repens ) spreads over all the temperate regions of the world , and in New Zealand is exterminating many native species , including even the native flax ( Phormium 1 Still more remarkable ...
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