Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 18
... less probable that a change in the physical conditions of a district , even small in amount if rapid , or even gradual if to a great amount , would be highly unfavourable to the existence of individuals , might cause the extinction of ...
... less probable that a change in the physical conditions of a district , even small in amount if rapid , or even gradual if to a great amount , would be highly unfavourable to the existence of individuals , might cause the extinction of ...
Page 20
... less than at present ; at all events the aquatic portion , with which geologists have most acquaintance , was probably often as great or greater . Now we know that there have been many complete changes of species ; new sets of organisms ...
... less than at present ; at all events the aquatic portion , with which geologists have most acquaintance , was probably often as great or greater . Now we know that there have been many complete changes of species ; new sets of organisms ...
Page 21
... less the theatre of life , and as the successive generations of each species died , their exuviæ and preservable parts would be deposited over every portion of the then existing seas and oceans , which we have reason for supposing to ...
... less the theatre of life , and as the successive generations of each species died , their exuviæ and preservable parts would be deposited over every portion of the then existing seas and oceans , which we have reason for supposing to ...
Page 26
... less unstable , and often have a tendency , if left to themselves , to return to the normal form of the parent species ; and this insta- bility is considered to be a distinctive peculiarity of all varieties , even of those occurring ...
... less unstable , and often have a tendency , if left to themselves , to return to the normal form of the parent species ; and this insta- bility is considered to be a distinctive peculiarity of all varieties , even of those occurring ...
Page 28
... less numerous than the herbivora ; eagles and lions can never be so plentiful as pigeons and antelopes ; and the wild asses of the Tartarian deserts cannot equal in numbers the horses of the more luxuriant prairies and pampas of America ...
... less numerous than the herbivora ; eagles and lions can never be so plentiful as pigeons and antelopes ; and the wild asses of the Tartarian deserts cannot equal in numbers the horses of the more luxuriant prairies and pampas of America ...
Other editions - View all
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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