Contributions to the Theory of Natural Selection: A Series of EssaysAMS Press, 1973 - 384 pages Wallace noticed on expeditions to the Amazon and the Malay archipelego that mammals in Southeast Asia are more advanced than their Australian cousins. His suggestion was that the two continents had split before the better adapted mammals had evolved in Asia. The isolated Australian marsupials were able to thrive, whilst those in Asia were driven to extinction by competition from more advanced mammals. This led to his theory of natural selection, which he presented to the Linnean Society in 1858 with Charles Darwin. This volume reprints those papers presented to the Linnean Society. |
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Page 73
... seems probable that in some cases that which would appear at first to be a source of danger to its possessor may really be a means of protection . Many showy and weak - flying butterflies have a very broad expanse of wing , as in the ...
... seems probable that in some cases that which would appear at first to be a source of danger to its possessor may really be a means of protection . Many showy and weak - flying butterflies have a very broad expanse of wing , as in the ...
Page 223
... seems highly probable that the older birds would begin building first , and that those born the preceding summer would follow their ex- ample , learning from them how the foundations of the nest are laid and the materials put together ...
... seems highly probable that the older birds would begin building first , and that those born the preceding summer would follow their ex- ample , learning from them how the foundations of the nest are laid and the materials put together ...
Page 260
... seem ready for any useful purpose . This seems to depend on the general law , that each species and each sex can only be modified just as far as is absolutely necessary for it to maintain itself in the struggle for existence , not a ...
... seem ready for any useful purpose . This seems to depend on the general law , that each species and each sex can only be modified just as far as is absolutely necessary for it to maintain itself in the struggle for existence , not a ...
Contents
Geographical distribution dependent on Geologic Changes A | 4 |
On the Tendency of Varieties to depart indefinitely from | 26 |
onlyCause of the dull Colours of Female BirdsUse of the gaudy | 129 |
Copyright | |
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Contributions to the Theory of Natural Selection: A Series of Essays ... Alfred Russel Wallace No preview available - 2018 |
Contributions to the Theory of Natural Selection: A Series of Essays Alfred Russel Wallace No preview available - 2016 |
Common terms and phrases
abundant action adapted allied animals appear beauty become believe birds body brain build butterflies causes Celebes changes character closely colour common comparatively completely concealed consider conspicuous continually direction distinct effect equally evidence exactly example existence explained facts faculties female flowers force further genera genus give greater groups habits imitation important increase India individuals inhabiting insects instinct islands kind known less limited living male materials means mimicry mind mode modifications moths natural selection necessary nest never objects observations occur organic origin Papilio perfect period phenomena possess present probably produced protection prove races reason regions remarkable render resemble result savage seems seen sexes shown similar species structure supposed tail theory tints tion trees true universe variation varied varieties various whole wings