of life; and we can
....... 1872 | clearly 1859 1860 1861 1866 1869 |
understand on this view the meaning of rudimentary organs. But disuse and selection will generally act on each creature, when it has come to maturity and has to play its full part in the struggle for existence, and will thus have little power
....... 1869 1872 | of acting 1859 1860 1861 1866 |
on an organ during early life; hence the organ will not be
....... 1869 1872 | much 1859 1860 1861 1866 |
reduced or rendered rudimentary at this early age. The calf, for instance, has inherited teeth, which never cut through the gums of the upper jaw, from an early progenitor having well-developed teeth; and we may believe, that the teeth in the mature animal were
formerly reduced formerly reduced 1872 |
reduced, during successive generations, 1859 1860 1866 1869 |
reduced, during successive genera- tions, 1861 |
by
disuse, disuse, 1866 1869 1872 | disuse 1859 1860 1861 |
owing to owing to 1872 | or by 1859 1860 1861 1866 1869 |
the tongue and
palate, palate, 1861 1866 1869 1872 | palate 1859 1860 |
or lips, having become excellently fitted through or lips, having become excellently fitted through 1872 |
having been fitted by 1859 |
having been better fitted by 1860 |
or lips, having become better fitted by 1861 1866 1869 |
natural selection to browse without their aid; whereas in the calf, the teeth have been left
unaffected, unaffected, 1872 |
untouched by selection or disuse, 1859 1860 1861 1866 1869 |
and on the principle of inheritance at corresponding ages have been inherited from a remote period to the present day. On the view of each
organism organism 1872 | organic 1859 1860 1861 1866 1869 |
with all its separate parts with all its separate parts 1872 |
being and each separate organ 1859 1860 1861 |
being and each of its separate parts 1866 |
being with all its separate parts 1869 |
having been specially created, how utterly inexplicable
is it is it 1872 | it is 1859 1860 1861 1866 1869 |
that
organs bearing the plain stamp of inutility, such as organs bearing the plain stamp of inutility, such as 1869 1872 |
parts, like 1859 1860 1861 |
organs, like 1866 |
the teeth in the embryonic calf or
....... 1866 1869 1872 | like 1859 1860 1861 |
the shrivelled wings under the soldered wing-covers of
many many 1869 1872 | some 1859 1860 1861 1866 |
beetles, should
....... 1869 1872 | thus 1859 1860 1861 1866 |
so frequently
occur. occur. 1869 1872 |
bear the plain stamp of inutility! Nature may be said to have taken pains to reveal, by rudimentary organs and by homologous structures, her scheme of modification, which it seems that we wilfully will not understand. 1859 |
bear the plain stamp of inutility! 1860 1861 1866 |
Nature may be said to have taken pains to
reveal reveal 1869 1872 | reveal, 1860 1861 1866 |
...OMIT 1869 1872 |
by rudimentary organs and by homologous structures, 1860 1861 1866 |
her scheme of modification,
by means of rudimentary organs, of em- bryological and homologous structures, but we are too blind to understand her meaning. by means of rudimentary organs, of em- bryological and homologous structures, but we are too blind to understand her meaning. 1872 |
which it seems that we wilfully will not understand. 1860 1861 1866 |
by means of rudimentary organs, embryological and homologous structures, but we wilfully will not understand the scheme. 1869 |
|
I have now recapitulated the
....... 1869 1872 | chief 1859 1860 1861 1866 |
facts and considerations which have thoroughly convinced me that species have
been modified, during a long course of descent. been modified, during a long course of descent. 1872 |
changed, and are still slowly changing by the preservation and accumulation of successive slight favourable variations. 1859 |
been modified, during a long course of descent, by the preservation or the natural selection of many successive slight favourable variations. 1860 1861 1866 |
been modified, during a long course of descent, chiefly through the natural selection of numerous successive, slight, favourable variations. 1869 |
|