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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Page 182
... birds , which vary partly in dependence on the situations chosen , and on the nature and temperature of the country inhabited , but often from causes wholly unknown to us : Audubon has given several remarkable cases of differences in ...
... birds , which vary partly in dependence on the situations chosen , and on the nature and temperature of the country inhabited , but often from causes wholly unknown to us : Audubon has given several remarkable cases of differences in ...
Page 187
... bird , than by their own mother's care , encum- bered as she can hardly fail to be by having eggs and young of different ages at the same time ; then the old birds or the fostered young would gain an advantage . And analogy would lead ...
... bird , than by their own mother's care , encum- bered as she can hardly fail to be by having eggs and young of different ages at the same time ; then the old birds or the fostered young would gain an advantage . And analogy would lead ...
Page 331
... bird , but only two out of the eleven marine birds , are peculiar ; and it is obvious that marine birds could arrive at these islands more easily than land- birds . Bermuda , on the other hand , which lies at about the same distance ...
... bird , but only two out of the eleven marine birds , are peculiar ; and it is obvious that marine birds could arrive at these islands more easily than land- birds . Bermuda , on the other hand , which lies at about the same distance ...
Contents
INTRODUCTION | 1 |
STRUGGLE FOR EXISTENCE | 52 |
NATURAL SELECTION | 69 |
Copyright | |
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Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence doubt embryo Europe existing exterminated extinct extremely facts favourable fertility flowers formation forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasional oceanic islands offspring Origin of Species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory tion trees variability variation vary whole widely