Comparison with 1861 |
|
inappreciable
by an by an 1859 1860 1861 1866 | except 1869 1872 |
uneducated uneducated 1859 1860 1861 1866 |
by an educated 1869 1872 |
eye. This process
of selection has been the great agency in the
production production 1859 1860 1861 1866 | formation 1869 1872 |
of the most distinct and useful domestic breeds. That many
of the of the 1859 1860 1861 1866 | of the 1869 1872 |
breeds produced by man have to a large extent the character of natural species, is shown by the inextricable doubts whether
very very 1859 1860 1861 1866 | very 1869 1872 |
many of them are varieties or aboriginal
species.
|
|
There is no obvious
reason why the principles which have acted so efficiently under domestication should not
have acted have acted 1859 1860 1861 1866 1872 | act 1869 |
under nature. In the
preservation preservation 1859 1860 1861 1866 | survival 1869 1872 |
of favoured individuals and races, during the constantly-recurrent Struggle for Existence, we see
the most the most 1859 1860 1861 1866 | a 1869 1872 |
powerful and ever-acting
means means 1859 1860 1861 1866 | form 1869 1872 |
of
selection. selection. 1859 1860 1861 1866 | Selection. 1869 1872 |
The struggle for existence inevitably follows from the high geometrical ratio of increase which is common to all organic beings. This high rate of increase is proved by calculation,
by the effects of
a succession of peculiar seasons,
or when naturalised in a new country. or when naturalised in a new country. 1860 1861 1866 |
and by the results of naturalisation, as explained in the third chapter. 1859 |
and when naturalised in a new country. 1869 |
and when naturalised in new countries. 1872 |
More individuals are born than can possibly survive. A grain in the balance
will will 1859 1860 1861 1866 | may 1869 1872 |
determine which
individual individual 1859 1860 1861 1866 | individuals 1869 1872 |
shall live and which shall die,— which variety or species shall increase in number, and which shall decrease, or finally become extinct. As the indi- viduals
of the same species come in all respects into the closest competition with each other, the struggle will generally be most severe between them; it will be almost equally severe between the varieties of the same species, and next in severity between the species of the same genus.
But But 1859 1860 1861 1866 | On 1869 1872 |
the
struggle struggle 1859 1860 1861 1866 |
other hand the struggle 1869 1872 |
will often be very
severe between beings
most most 1859 1860 1861 1866 | most 1869 1872 |
remote in the scale of nature. The slightest advantage in
one being, one being, 1859 1860 1861 1866 | certain individuals, 1869 1872 |
at any age or during any season, over those with which
it it 1859 1860 1861 1866 | they 1869 1872 |
comes comes 1859 1860 1861 1866 | come 1869 1872 |
into competition, or better adaptation in however slight a degree to the surrounding physical conditions, will
turn
the balance.
|
inappreciable
except except 1869 1872 | by an 1859 1860 1861 1866 |
by an educated by an educated 1869 1872 |
uneducated 1859 1860 1861 1866 |
eye. This
process process 1859 1860 1861 1866 1869 | unconscious process 1872 |
of selection has been the great agency in the
formation formation 1869 1872 | production 1859 1860 1861 1866 |
of the most distinct and useful domestic breeds. That many
....... 1869 1872 | of the 1859 1860 1861 1866 |
breeds produced by man have to a large extent the character of natural species, is shown by the inextricable doubts whether
....... 1869 1872 | very 1859 1860 1861 1866 |
many of them are varieties or
aboriginally aboriginally 1861 1866 1869 1872 | aboriginal 1859 1860 |
distinct species. distinct species. 1861 1866 1869 1872 | species. 1859 1860 |
|
|
There is no
obvious obvious 1859 1860 1861 1866 1869 | obvious 1872 |
reason why the principles which have acted so efficiently under domestication should not
act act 1869 | have acted 1859 1860 1861 1866 1872 |
under nature. In the
survival survival 1869 1872 | preservation 1859 1860 1861 1866 |
of favoured individuals and races, during the constantly-recurrent Struggle for Existence, we see
a a 1869 1872 | the most 1859 1860 1861 1866 |
powerful and ever-acting
form form 1869 1872 | means 1859 1860 1861 1866 |
of
Selection. Selection. 1869 1872 | selection. 1859 1860 1861 1866 |
The struggle for existence inevitably follows from the high geometrical ratio of increase which is common to all organic beings. This high rate of increase is proved by
calculation,— calculation,— 1860 1861 1866 1869 1872 | calculation, 1859 |
by the
rapid increase of many animals and plants during rapid increase of many animals and plants during 1860 1861 1866 1869 1872 |
effects of 1859 |
a succession of peculiar seasons,
and when naturalised in a new country. and when naturalised in a new country. 1869 |
and by the results of naturalisation, as explained in the third chapter. 1859 |
or when naturalised in a new country. 1860 1861 1866 |
and when naturalised in new countries. 1872 |
More individuals are born than can possibly survive. A grain in the balance
may may 1869 1872 | will 1859 1860 1861 1866 |
determine which
individuals individuals 1869 1872 | individual 1859 1860 1861 1866 |
shall live and which shall die,— which variety or species shall increase in number, and which shall decrease, or finally become extinct. As the
individuals individuals 1860 1861 1866 1869 1872 | indi- viduals 1859 |
of the same species come in all respects into the closest competition with each other, the struggle will generally be most severe between them; it will be almost equally severe between the varieties of the same species, and next in severity between the species of the same genus.
On On 1869 1872 | But 1859 1860 1861 1866 |
the
other hand the struggle other hand the struggle 1869 1872 |
struggle 1859 1860 1861 1866 |
will often be
very very 1859 1860 1861 1866 1869 | very 1872 |
severe between
beings beings 1859 1860 1861 1869 1872 | being 1866 |
....... 1869 1872 | most 1859 1860 1861 1866 |
remote in the scale of nature. The slightest advantage in
certain individuals, certain individuals, 1869 1872 | one being, 1859 1860 1861 1866 |
at any age or during any season, over those with which
they they 1869 1872 | it 1859 1860 1861 1866 |
come come 1869 1872 | comes 1859 1860 1861 1866 |
into competition, or better adaptation in however slight a degree to the surrounding physical conditions,
will will 1859 1860 1861 1866 1869 | will, 1872 |
turn turn 1859 1860 1861 1866 1869 | in 1872 |
the
balance. balance. 1859 1860 1861 1866 1869 |
long run, turn the balance. 1872 |
|