Contributions to the Theory of Natural Selection: A Series of Essays |
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Page x
237 Passage rewritten , on more or less variable characters in relation to
nidification . 248 On males choosing or rejecting females , and on the various
modes in which colour may be acquired by female birds . PAGE 249 On probable
ancestral ...
237 Passage rewritten , on more or less variable characters in relation to
nidification . 248 On males choosing or rejecting females , and on the various
modes in which colour may be acquired by female birds . PAGE 249 On probable
ancestral ...
Page xiii
... a Species dependent upon its more or less perfect Adaptation to the
Conditions of Existence - Useful Variations will tend to Increase , useless or
hurtful Variations to Diminish - - Superior Varieties will ultimately extirpate the
Original Species ...
... a Species dependent upon its more or less perfect Adaptation to the
Conditions of Existence - Useful Variations will tend to Increase , useless or
hurtful Variations to Diminish - - Superior Varieties will ultimately extirpate the
Original Species ...
Page 2
... not once merely , but perhaps hundreds , perhaps thousands of times : — That
all these operations have been more or less continuous , but unequal in their
progress , and during the whole series the organic life of the earth has
undergone a ...
... not once merely , but perhaps hundreds , perhaps thousands of times : — That
all these operations have been more or less continuous , but unequal in their
progress , and during the whole series the organic life of the earth has
undergone a ...
Page 16
... but in its turn become extinct , and give place to yet another modification from
the same root , which may be of higher or lower organization , more or less
numerous in species , and more or less varied in form and structure than either of
those ...
... but in its turn become extinct , and give place to yet another modification from
the same root , which may be of higher or lower organization , more or less
numerous in species , and more or less varied in form and structure than either of
those ...
Page 18
On the other hand , it seems no 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 ...
On the other hand , it seems no 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 ...
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Common terms and phrases
abundant action adapted allied animals appear beautiful become believe birds body build butterflies causes Celebes changes character closely colour common comparatively complete concealment consider conspicuous continually direct distinct doubt Edition equally evidence exactly example existence explained facts female flight flowers frequently further genera genus give greater groups habits imitation important increase India individuals inhabiting insects interesting islands Java kind known less limited living male marked materials means mimicry modifications moths natural selection necessary nest never objects observations occur organic original Papilio perfect period phenomena possess present probably produced protection race reason region remarkable render resemble result savage seems seen sexes shown similar species structure supposed tail theory tints tion trees tropical true universe variation varied varieties various whole wings
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Bibliographic information
| Title | Contributions to the Theory of Natural Selection: A Series of Essays Contributions to the Theory of Natural Selection: A Series of Essays, Alfred Russel Wallace Marilee E. Thomas and Robert C. Thomas Science and Related Subjects Collection |
| Author | Alfred Russel Wallace |
| Edition | 2 |
| Publisher | Macmillan and Company, 1870 |
| Original from | Oxford University |
| Digitized | 8 mai 2006 |
| Length | 384 pages |
| Export Citation | BiBTeX EndNote RefMan |