| Comparison with 1860 |
|
|
Whatever the cause may be of each slight difference in
the offspring from
their parents—
and a cause for each must exist—
it
is the steady accumulation,
through natural selection, of such differences, when beneficial to the individual, that
gives
rise to all the more important
modifications of structure,
by which the innumerable beings on the face of this earth are enabled to struggle with each other, and the best adapted to survive. |
Whatever the cause may be of each slight difference
in | in 1859 1860 1861 1866 | | between 1869 1872 |
| from 1859 1860 1861 1866 | | and 1869 1872 |
| parents— 1859 1860 1861 1872 | | parents — 1866 1869 |
| exist— 1859 1860 1861 1872 | | exist — 1866 1869 |
| it 1859 1860 1861 1866 1869 |
| we have reason to believe that it 1872 |
| accumulation, 1859 1860 1861 1866 1869 | | accumulation 1872 |
| through natural selection, of such differences, when beneficial to the individual, that 1859 1860 1861 1866 |
| through natural selection, of beneficial differences that has 1869 |
| of beneficial differences which has 1872 |
| gives 1859 1860 1861 1866 | | given 1869 1872 |
| the more important 1859 1860 1861 1866 1872 |
| those 1869 |
| structure, 1859 1860 1861 1866 | | structure 1869 1872 |
| by which the innumerable beings on the face of this earth are enabled to struggle with each other, and the best adapted to survive. 1859 1860 1861 1866 |
| which are the most important for the welfare of each species. 1869 |
| in relation to the habits of each species. 1872 |
|
