| → The result depends on there being 1869 |
| Its action depends on there being 1859 1860 1861 1866 |
| It can act only when there are 1872 |
|
| → polity of nature, 1859 1860 1861 1866 1869 |
| natural polity of a district 1872 |
|
| → some of the inhabitants of the country under-going 1869 |
| some of the inhabitants of the country undergoing 1859 1860 1861 |
| some of the inhabitants of the country under- going 1866 |
| the 1872 |
|
| → kind. 1859 1860 1861 1866 1869 |
| of its existing inhabitants. 1872 |
|
| ↑ 2 blocks not present in 1859 1860 1861 1866 1869; present in 1872 |
| The occurrence of such places will often depend on physical changes, which generally take place very slowly, and on the immigration of better adapted forms being prevented.
As some few of the old inhabitants become modified, the mutual relations of others will often be disturbed; and this will create new places, ready to be filled up by better adapted forms; but all this will take place very slowly.
|
|
| → more or less 1869 |
| in some slight degree 1872 |
|
| → OMIT 1869 |
| it would often be long before 1872 |
|
| → better adapted to the then existing conditions, may not soon 1869 |
| in various parts of the organisation might 1872 |
|
| ↑ 3 blocks not present in 1869 1872; present in 1859 1860 1861 1866 |
| But the action of natural selection will probably still oftener depend on some of
the inhabitants becoming slowly modified; the mutual relations of many of the other inhabitants being thus disturbed.
Nothing can be effected, unless favourable variations occur, and variation itself is apparently always a very
slow process.
The process will often be greatly retarded by free intercrossing.
|
|
| → But 1869 1872 |
| On the other hand, 1859 1860 1861 1866 |
|
| → in effecting changes, at 1869 |
| often only at 1859 1860 1861 |
| generally at only 1866 |
| only at 1872 |
|
| → results of natural selection accord perfectly 1869 |
| action of natural selection accords perfectly 1859 1860 1861 1866 |
| results accord 1872 |
|
