Comparison with 1859 |
|
With animals having separated sexes
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 nature, in the same way as they
generally generally 1859 1860 1861 1866 | generally 1869 1872 |
have varied under
the changed conditions of the changed conditions of 1859 1860 1861 1866 |
OMIT 1869 1872 |
domestication. And if there be
any variability under nature, it would be an unaccountable fact if natural selection
had had 1859 1860 1861 1866 1872 | did 1869 |
not come into play. It has often been asserted, but the assertion is
quite quite 1859 1860 1861 1866 | quite 1869 1872 |
incapable of proof, that the amount of variation under nature is a strictly limited quantity. Man, though acting on external characters alone and often capriciously, can produce within a short period a great result by adding up mere individual differences in his domestic productions; and every one admits that
there are at least there are at least 1859 1860 1861 1866 |
species present 1869 1872 |
individual
differences differences 1859 1860 1861 1866 | differences. 1869 1872 |
in in 1859 1860 1861 1866 | in 1869 1872 |
species species 1859 1860 1861 1866 | species 1869 1872 |
under under 1859 1860 1861 1866 | under 1869 1872 |
nature. nature. 1859 1860 1861 1866 | nature. 1869 1872 |
But, besides such differences, all naturalists
have admitted the existence of varieties, which they think have admitted the existence of varieties, which they think 1859 1860 |
have admitted the existence of varieties, which they have considered 1861 1866 |
admit that varieties exist, which are considered 1869 |
admit that natural varieties exist, which are considered 1872 |
sufficiently distinct to be worthy of record in systematic
works. No one
can can 1859 1860 1861 1866 | has 1869 1872 |
draw draw 1859 1860 1861 1866 | drawn 1869 1872 |
any clear distinction between individual differences and slight varieties; or between more plainly marked varieties and sub-species, and species. ↑1 blocks not present in 1859 1860 1861; present in 1866 1869 1872 | On separate continents, and on different parts of the same continent when divided by barriers of any kind, and on outlying islands,
what a multitude
of forms exist, which some experienced naturalists rank as varieties,
others as geographical races or sub-species, and others as distinct, though closely allied species!
|
Let it be observed how naturalists differ in the rank which they assign to the many representative forms in Europe and North America. |
|
If then
we have under nature variability and a powerful agent always ready to act and select, we have under nature variability and a powerful agent always ready to act and select, 1859 1860 |
we have variability as well as a powerful agent always ready to act, 1861 |
animals and plants do vary, let it be ever so slowly or so little, 1866 |
animals and plants do vary, let it be ever so little or so slowly, 1869 |
animals and plants do vary, let it be ever so slightly or slowly, 1872 |
|
With animals having separated
sexes sexes 1859 1860 1861 1866 1869 | sexes, 1872 |
there will
be in most cases be in most cases 1869 1872 |
in most cases be 1859 1860 1861 1866 |
a struggle between the males for
the possession the possession 1866 1869 1872 | possession 1859 1860 1861 |
of the females. The most vigorous
males, males, 1866 1869 1872 | individuals, 1859 1860 1861 |
or those which have most successfully struggled with their conditions of life, will generally leave most progeny. But success will often depend on
the males having the males having 1866 1869 1872 |
having 1859 1860 1861 |
special
weapons, weapons, 1869 1872 | weapons 1859 1860 1861 1866 |
or means of defence, or
charms; and a slight charms; and a slight 1869 1872 |
on the charms of the males; and the slightest 1859 1860 1861 |
on their charms; and the slighest 1866 |
advantage will lead to victory. |
|
As geology plainly proclaims that each land has undergone great physical changes, we might have expected
to find that to find that 1869 1872 |
that 1859 1860 1861 1866 |
organic beings
....... 1869 1872 | would 1859 1860 1861 1866 |
have varied under nature, in the same way as they
....... 1869 1872 | generally 1859 1860 1861 1866 |
have varied under
...OMIT 1869 1872 |
the changed conditions of 1859 1860 1861 1866 |
domestication. And if there
be be 1859 1860 1861 1866 1869 | has been 1872 |
any variability under nature, it would be an unaccountable fact if natural selection
did did 1869 | had 1859 1860 1861 1866 1872 |
not come into play. It has often been asserted, but the assertion is
....... 1869 1872 | quite 1859 1860 1861 1866 |
incapable of proof, that the amount of variation under nature is a strictly limited quantity. Man, though acting on external characters alone and often capriciously, can produce within a short period a great result by adding up mere individual differences in his domestic productions; and every one admits that
species present species present 1869 1872 |
there are at least 1859 1860 1861 1866 |
individual
differences. differences. 1869 1872 | differences 1859 1860 1861 1866 |
....... 1869 1872 | in 1859 1860 1861 1866 |
....... 1869 1872 | species 1859 1860 1861 1866 |
....... 1869 1872 | under 1859 1860 1861 1866 |
....... 1869 1872 | nature. 1859 1860 1861 1866 |
But, besides such differences, all naturalists
admit that varieties exist, which are considered admit that varieties exist, which are considered 1869 |
have admitted the existence of varieties, which they think 1859 1860 |
have admitted the existence of varieties, which they have considered 1861 1866 |
admit that natural varieties exist, which are considered 1872 |
sufficiently distinct to be worthy of record in
systematic systematic 1859 1860 1869 1872 | their systematic 1861 1866 |
works. No one
has has 1869 1872 | can 1859 1860 1861 1866 |
drawn drawn 1869 1872 | draw 1859 1860 1861 1866 |
any clear distinction between individual differences and slight varieties; or between more plainly marked varieties and sub-species, and species. On separate continents, and on different parts of the same continent when divided by barriers of any kind, and on
outlying islands, outlying islands, 1869 1872 |
the several islands in the same archipelago, 1866 |
what a
multitude multitude 1869 1872 | host 1866 |
of forms exist, which some experienced naturalists rank as
varieties, varieties, 1869 1872 | mere varieties, 1866 |
others as geographical races or sub-species, and others as distinct, though closely allied species! ↑1 blocks not present in 1866 1869 1872; present in 1859 1860 1861 | Let it be observed how naturalists differ in the rank which they assign to the many representative forms in Europe and North America.
|
|
|
If
then then 1859 1860 1861 1866 1869 | then, 1872 |
animals and plants do vary, let it be ever so little or so slowly, animals and plants do vary, let it be ever so little or so slowly, 1869 |
we have under nature variability and a powerful agent always ready to act and select, 1859 1860 |
we have variability as well as a powerful agent always ready to act, 1861 |
animals and plants do vary, let it be ever so slowly or so little, 1866 |
animals and plants do vary, let it be ever so slightly or slowly, 1872 |
|