Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 3
... individual operation . The great increase of our knowledge within the last twenty years , both of the present and past history of the organic world , has accumulated a body of facts which should afford a sufficient foundation for a ...
... individual operation . The great increase of our knowledge within the last twenty years , both of the present and past history of the organic world , has accumulated a body of facts which should afford a sufficient foundation for a ...
Page 18
... individuals and also as to variety of species and generic group , just as we now find that the places best adapted to the rapid growth and in- crease of individuals also contain the greatest pro- fusion of species and the greatest ...
... individuals and also as to variety of species and generic group , just as we now find that the places best adapted to the rapid growth and in- crease of individuals also contain the greatest pro- fusion of species and the greatest ...
Page 28
... individuals and of entire species . These conditions will also determine the population of a species ; and by a careful consideration of all the circumstances we may be enabled to comprehend , and in some degree to explain , what at ...
... individuals and of entire species . These conditions will also determine the population of a species ; and by a careful consideration of all the circumstances we may be enabled to comprehend , and in some degree to explain , what at ...
Page 30
... individuals exist- ing in any given country , twice that number must perish annually , -a striking result , but one which seems at least highly probable , and is perhaps under rather than over the truth . It would therefore ap- pear ...
... individuals exist- ing in any given country , twice that number must perish annually , -a striking result , but one which seems at least highly probable , and is perhaps under rather than over the truth . It would therefore ap- pear ...
Page 32
... individuals ? Not because they are more prolific than others , generally the con- trary ; but because their food ... individual existence of each animal depends upon itself , those that die must be the weakest the very young , the aged ...
... individuals ? Not because they are more prolific than others , generally the con- trary ; but because their food ... individual existence of each animal depends upon itself , those that die must be the weakest the very young , the aged ...
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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