Comparison with 1872 |
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varieties or incipient species, retain to a certain degree the character of varieties; for they differ from each other by a less amount of difference than do the species of smaller genera. The closely allied species also of the larger genera apparently have restricted ranges, and they
are clustered in little groups round other species— in
both both 1872 |
which 1859 1860 1861 |
both of which 1866 1869 |
respects
....... 1872 | they 1859 1860 1861 1866 1869 |
resembling resembling 1872 | resemble 1859 1860 1861 1866 1869 |
varieties. These are strange relations on the view of
each species having been
independently created, but are intelligible if all species first existed as
varieties.
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As each species tends by its geometrical
rate rate 1872 | ratio 1859 1860 1861 1866 1869 |
of reproduction to increase inordinately in number; and as the modified descendants of each species will be enabled to increase by
as as 1872 | so 1859 1860 1861 1866 1869 |
much
....... 1872 | the more 1859 1860 1861 1866 1869 |
as they become
more more 1859 1872 | more 1860 1861 1866 1869 |
diversified in habits and structure, so as to be
able able 1872 | enabled 1859 1860 1861 1866 1869 |
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
during a long-continued course of modification, the slight
differences differences 1872 | differences, 1859 1860 1861 1866 1869 |
characteristic of varieties of the same species, tend to be augmented into the greater differences characteristic of species
of the same genus. New and improved varieties will inevitably supplant and exterminate the older, less
improved, improved, 1872 | improved 1859 1860 1861 1866 1869 |
and intermediate varieties; and thus species are rendered to a large extent defined and distinct objects. Dominant species belonging to the larger groups tend
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
go on go on 1872 | succeed in 1859 1860 1861 1866 1869 |
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
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varieties or incipient species, retain to a certain degree the character of varieties; for they differ from each other by a less amount of difference than do the species of smaller genera. The closely allied species also of the larger genera apparently have restricted ranges, and
in their affinities they in their affinities they 1860 1861 1866 1869 1872 |
they 1859 |
are clustered in little groups round other species— in
both of which both of which 1866 1869 |
which 1859 1860 1861 |
both 1872 |
respects
they they 1859 1860 1861 1866 1869 | they 1872 |
resemble resemble 1859 1860 1861 1866 1869 | resembling 1872 |
varieties. These are strange relations on the view
that that 1866 1869 1872 | of 1859 1860 1861 |
each species
was was 1866 1869 1872 | having been 1859 1860 1861 |
independently created, but are intelligible if
each existed first as a each existed first as a 1866 1869 1872 |
all species first existed as 1859 1860 1861 |
variety. variety. 1866 1869 1872 | varieties. 1859 1860 1861 |
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|
As each species tends by its geometrical
ratio ratio 1859 1860 1861 1866 1869 | rate 1872 |
of reproduction to increase inordinately in number; and as the modified descendants of each species will be enabled to increase by
so so 1859 1860 1861 1866 1869 | as 1872 |
much
the more the more 1859 1860 1861 1866 1869 | the more 1872 |
as they 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, 1866 1869 1872 | Hence 1859 1860 1861 |
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
the species the species 1866 1869 1872 | species 1859 1860 1861 |
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
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