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,— 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,
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
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.
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 very 1859 1860 1861 1866 1869 | very 1872 |
severe between
beings beings 1859 1860 1861 1869 1872 | being 1866 |
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 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 |
|
|
With animals having separated
sexes sexes 1859 1860 1861 1866 1869 | sexes, 1872 |
there will
in most cases be in most cases be 1859 1860 1861 1866 |
be in most cases 1869 1872 |
a struggle between the males for
possession possession 1859 1860 1861 | the possession 1866 1869 1872 |
of the females. The most vigorous
individuals, individuals, 1859 1860 1861 | males, 1866 1869 1872 |
or those which have most successfully struggled with their conditions of life, will generally leave most progeny. But success will often depend on
having having 1859 1860 1861 |
the males having 1866 1869 1872 |
special
weapons weapons 1859 1860 1861 1866 | weapons, 1869 1872 |
or means of defence, or
on the charms of the males; and the slightest on the charms of the males; and the slightest 1859 1860 1861 |
on their charms; and the slighest 1866 |
charms; and a slight 1869 1872 |
advantage will lead to victory. |
|
As geology plainly proclaims that each land has undergone great physical changes, we might have expected
that that 1859 1860 1861 1866 |
to find that 1869 1872 |
organic beings
would would 1859 1860 1861 1866 | would 1869 1872 |
have varied under
|