Comparison with 1861 |
|
would be strange
facts
if species have
been independently created,
and varieties have
been produced by
secondary laws. |
|
If we admit that the geological record is imperfect in
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 1861 |
gives, 1859 1860 |
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
the principle of natural selection; for old forms will be
supplanted by new and improved forms. Neither single species nor groups of species reappear
when the chain of ordinary generation has
once been
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 fossils in the
formations formations 1859 1860 1861 1869 1872 | formation 1866 |
above and below, is simply explained by their intermediate position in the chain of descent. The grand fact that all extinct organic
beings belong to the same system with
recent beings, falling either into the same or into intermediate groups,
follows from the living and the extinct being the
off-spring off-spring 1861 | offspring 1859 1860 1866 1869 1872 |
of common parents. As the groups which have descended from an ancient progenitor
have generally diverged in character,
the progenitor with its early descendants will often be intermediate in character in comparison with its later descendants; and thus
we can see
why the
more ancient a fossil is, the oftener it stands
in some degree intermediate between
|
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
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
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 1866 | forms, 1859 1860 1861 1869 1872 |
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 fossils in the
formation formation 1866 | formations 1859 1860 1861 1869 1872 |
above and below, is simply explained by their intermediate position in the chain of descent. The grand fact that all extinct
organic organic 1859 1860 1861 1866 | organic 1869 1872 |
beings
belong to the same system with belong to the same system with 1859 1860 1861 1866 |
can be classed with all 1869 1872 |
recent beings,
falling either into the same or into intermediate groups, falling either into the same or into intermediate groups, 1859 1860 1861 1866 |
naturally 1869 1872 |
follows from the living and the extinct being the
offspring offspring 1859 1860 1866 1869 1872 | off-spring 1861 |
of common parents. As
the groups which have descended from an ancient progenitor the groups which have descended from an ancient progenitor 1859 1860 1861 1866 |
species 1869 1872 |
have generally diverged in
character, character, 1859 1860 1861 1866 | character 1869 1872 |
the progenitor with its early descendants will often be intermediate in character in comparison with its later descendants; and thus the progenitor with its early descendants will often be intermediate in character in comparison with its later descendants; and thus 1859 1860 1861 1866 |
during their long course of descent and modification, 1869 1872 |
we can
see see 1859 1860 1861 1866 | understand 1869 1872 |
why
the the 1859 1860 1861 1866 |
it is that the 1869 1872 |
more ancient
a fossil is, the oftener it stands a fossil is, the oftener it stands 1859 1860 1861 1866 |
forms, or early progenitors of each group, so often occupy a position 1869 1872 |
in some degree intermediate between
|