become
....... 1860 1861 1866 1869 | more 1859 1872 |
diversified in habits and structure, so as to be
enabled enabled 1859 1860 1861 1866 1869 | able 1872 |
to seize on many and widely different places in the economy of nature, there will be a constant tendency in natural selection to preserve the most divergent offspring of any one species.
Hence Hence 1859 1860 1861 | Hence, 1866 1869 1872 |
during a long-continued course of modification, the slight
differences, differences, 1859 1860 1861 1866 1869 | differences 1872 |
characteristic of varieties of the same species, tend to be augmented into the greater differences characteristic of
species species 1859 1860 1861 | the species 1866 1869 1872 |
of the same genus. New and improved varieties will inevitably supplant and exterminate the older, less
improved improved 1859 1860 1861 1866 1869 | improved, 1872 |
and intermediate varieties; and thus species are rendered to a large extent defined and distinct objects. Dominant species belonging to the larger groups
within each class tend within each class tend 1861 1866 1869 1872 |
tend 1859 1860 |
to give birth to new and dominant forms; so that each large group tends to become still larger, and at the same time more divergent in character. But as all groups cannot thus
succeed in succeed in 1859 1860 1861 1866 1869 | go on 1872 |
increasing in size, for the world would not hold them, the more dominant groups beat the less dominant. This tendency in the large groups to go on increasing in size and diverging in character, together with the
almost almost 1859 1860 1861 1866 1869 | almost 1872 |
inevitable contingency of much extinction, explains the arrangement of all the forms of
life, life, 1859 1860 1861 1866 1869 | life 1872 |
in groups subordinate to groups, all within a few great classes, which
...OMIT 1861 1866 1869 1872 |
we now see everywhere around us, and which 1859 1860 |
has prevailed throughout all time. This grand fact of the grouping of all organic beings
is is 1861 1866 |
seems to me 1859 1860 |
under what is called the Natural System, is 1869 1872 |
utterly inexplicable on the theory of creation. |
|
As natural selection acts solely by accumulating slight, successive, favourable variations, it can produce no great or sudden
modification; modification; 1859 1860 1861 1866 1869 | modifica- tions; 1872 |
it can act only by
very very 1859 1860 1861 1866 | very 1869 1872 |
short and slow steps.
Hence Hence 1859 1860 1861 1866 1869 | Hence, 1872 |
the canon of "Natura non facit saltum," which every fresh addition to our knowledge tends to
make truer, make truer, 1860 1861 1866 1869 |
make more strictly correct, 1859 |
confirm, 1872 |
is on this theory
simply simply 1859 1860 1861 1866 | simply 1869 1872 |
intelligible. ↑1 blocks not present in 1859 1860 1861; present in 1866 1869 1872 | We can see why throughout nature the same general end is gained by an almost infinite diversity of means;
for every peculiarity when once acquired is long inherited, and structures already diversified
in many ways
have to be adapted for the same general purpose.
|
We
can can 1859 1860 1861 | can, 1866 1869 1872 |
plainly plainly 1859 1860 1861 | in short, 1866 1869 1872 |
see why nature is prodigal
|