Comparison with 1869 |
|
yet
....... 1869 1872 | should 1859 1860 1861 1866 |
follow nearly the same instincts; why the
thrushes thrushes 1866 1869 1872 | thrush 1859 1860 1861 |
of
tropical and temperate South tropical and temperate South 1866 1869 1872 |
South 1859 1860 1861 |
America, for instance,
line line 1866 1869 1872 | lines 1859 1860 1861 |
their their 1866 1869 1872 | her 1859 1860 1861 |
nests nests 1866 1869 1872 | nest 1859 1860 1861 |
with mud like our British species. On the view of instincts having been slowly acquired through natural
selection, selection, 1869 1872 | selection 1859 1860 1861 1866 |
we need not marvel at some instincts being apparently
not perfect and liable to mistakes, and at many instincts causing other animals to suffer. |
|
If species be only well-marked and permanent varieties, we can at once see why their crossed offspring should follow the same complex laws in their degrees and kinds of resemblance to their parents,— in being absorbed into each other by successive crosses, and in other such points,— as do the crossed offspring of acknowledged varieties.
This similarity This similarity 1869 1872 |
On the other hand, these 1859 1860 1861 1866 |
would be
a strange a strange 1869 1872 | strange 1859 1860 1861 1866 |
fact, fact, 1869 1872 | facts 1859 1860 1861 1866 |
if species have
been independently
created created 1869 1872 | created, 1859 1860 1861 1866 |
and varieties have
been produced
through through 1869 1872 | by 1859 1860 1861 1866 |
secondary laws. |
|
If we admit that the geological record is imperfect in
an extreme degree, then
the the 1866 1869 1872 | such 1859 1860 1861 |
facts, facts, 1866 1869 1872 | facts 1859 1860 1861 |
which which 1866 1869 1872 | as 1859 1860 1861 |
the record
does give, strongly does give, strongly 1866 1869 1872 |
gives, 1859 1860 |
gives 1861 |
support the theory of descent with modification. New species have come on the stage slowly and at successive intervals; and the amount of change, after equal intervals of time, is widely different in different groups. The extinction of species and of whole groups of species, which has played so conspicuous a part in the history of the organic world, almost inevitably follows
from from 1869 1872 | on 1859 1860 1861 1866 |
the principle of natural selection; for old forms
are are 1869 1872 | will be 1859 1860 1861 1866 |
supplanted by new and improved forms. Neither single species nor groups of species reappear
when the chain of ordinary generation
is is 1869 1872 | has 1859 1860 1861 1866 |
once
....... 1869 1872 | been 1859 1860 1861 1866 |
broken. The gradual diffusion of dominant forms,
with the slow modification of their descendants, causes the forms of life, after long intervals of time, to appear as if they had changed simultaneously throughout the world. The fact of the fossil remains of each formation being in some degree intermediate in character between the
|
yet
should should 1859 1860 1861 1866 | should 1869 1872 |
follow nearly the same instincts; why the
thrush thrush 1859 1860 1861 | thrushes 1866 1869 1872 |
of
South South 1859 1860 1861 |
tropical and temperate South 1866 1869 1872 |
America, for instance,
lines lines 1859 1860 1861 | line 1866 1869 1872 |
her her 1859 1860 1861 | their 1866 1869 1872 |
nest nest 1859 1860 1861 | nests 1866 1869 1872 |
with mud like our British species. On the view of instincts having been slowly acquired through natural
selection selection 1859 1860 1861 1866 | selection, 1869 1872 |
we need not marvel at some instincts being
apparently apparently 1859 1860 1861 1866 1869 | apparently 1872 |
not perfect and liable to mistakes, and at many instincts causing other animals to suffer. |
|
If species be only well-marked and permanent varieties, we can at once see why their crossed offspring should follow the same complex laws in their degrees and kinds of resemblance to their parents,— in being absorbed into each other by successive crosses, and in other such points,— as do the crossed offspring of acknowledged varieties.
On the other hand, these On the other hand, these 1859 1860 1861 1866 |
This similarity 1869 1872 |
would be
strange strange 1859 1860 1861 1866 | a strange 1869 1872 |
facts facts 1859 1860 1861 1866 | fact, 1869 1872 |
if species
have have 1859 1860 1861 1866 1869 | had 1872 |
been independently
created, created, 1859 1860 1861 1866 | created 1869 1872 |
and varieties
have have 1859 1860 1861 1866 1869 | had 1872 |
been produced
by by 1859 1860 1861 1866 | through 1869 1872 |
secondary laws. |
|
If we admit that the geological record is imperfect
in in 1859 1860 1861 1866 1869 | to 1872 |
an extreme degree, then
such such 1859 1860 1861 | the 1866 1869 1872 |
facts facts 1859 1860 1861 | facts, 1866 1869 1872 |
as as 1859 1860 1861 | which 1866 1869 1872 |
the record
gives, gives, 1859 1860 |
gives 1861 |
does give, strongly 1866 1869 1872 |
support the theory of descent with modification. New species have come on the stage slowly and at successive intervals; and the amount of change, after equal intervals of time, is widely different in different groups. The extinction of species and of whole groups of species, which has played so conspicuous a part in the history of the organic world, almost inevitably follows
on on 1859 1860 1861 1866 | from 1869 1872 |
the principle of natural selection; for old forms
will be will be 1859 1860 1861 1866 | are 1869 1872 |
supplanted by new and improved forms. Neither single species nor groups of species
reappear reappear 1859 1860 1861 1866 1869 | re-appear 1872 |
when the chain of ordinary generation
has has 1859 1860 1861 1866 | is 1869 1872 |
once
been been 1859 1860 1861 1866 | been 1869 1872 |
broken. The gradual diffusion of dominant
forms, forms, 1859 1860 1861 1869 1872 | forms 1866 |
with the slow modification of their descendants, causes the forms of life, after long intervals of time, to appear as if they had changed simultaneously throughout the world. The fact of the fossil remains of each formation being in some degree intermediate in character between the
|