Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 10
... original species die out , and the modified prototypes only remain . In the same way we can account for the separate islands having each their peculiar species , either on the supposition that the same original emigration peopled the ...
... original species die out , and the modified prototypes only remain . In the same way we can account for the separate islands having each their peculiar species , either on the supposition that the same original emigration peopled the ...
Page 26
... ORIGINAL TYPE . * Instability of Varieties supposed to prove the permanent distinctness of Species . ONE of the strongest arguments which have been ad- duced to prove the original and permanent distinct- ness of species is , that ...
... ORIGINAL TYPE . * Instability of Varieties supposed to prove the permanent distinctness of Species . ONE of the strongest arguments which have been ad- duced to prove the original and permanent distinct- ness of species is , that ...
Page 27
... original species , there is generally no means of de- termining , except in those rare cases in which the one race has been known to produce an offspring unlike itself and resembling the other . This , how- ever , would seem quite ...
... original species , there is generally no means of de- termining , except in those rare cases in which the one race has been known to produce an offspring unlike itself and resembling the other . This , how- ever , would seem quite ...
Page 28
A Series of Essays Alfred Russel Wallace. original type , and which also produces , in domesti- cated animals , the tendency of varieties to return to the parent form . The Struggle for Existence . The life of wild animals is a struggle ...
A Series of Essays Alfred Russel Wallace. original type , and which also produces , in domesti- cated animals , the tendency of varieties to return to the parent form . The Struggle for Existence . The life of wild animals is a struggle ...
Page 29
... . With such powers of in- This is under estimated . The number would really amount to more than two thousand millions ! crease the population must have reached its limits , and INDEFINITELY FROM THE ORIGINAL TYPE . 29.
... . With such powers of in- This is under estimated . The number would really amount to more than two thousand millions ! crease the population must have reached its limits , and INDEFINITELY FROM THE ORIGINAL TYPE . 29.
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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 alike Amboyna animals antennæ appear beautiful become bees beetles birds Borneo brain brilliant build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Darwin Diphilus distinct Edition eggs essay evidence exactly existence external extinct Extra fcap facts faculties favourable Fcap flowers genera genus geological groups Guinea habits Heliconidæ imitation India individuals inhabiting insects instinct islands Java larvæ Lepidoptera less Malayan male Mimeta mimic mimicry mode modified Moluccas moths natural selection nectary nest never nidification number of species observations occur organic Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionidæ peculiar perfect period phenomena POEMS Polydorus possess present probably produced protection race regions remarkable render resemble savage sexes sexual sexual selection shown structure Sumatra tail theory of natural Theseus tints tion trees tropical variation varied varieties whole wings
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