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climate may be exactly the same as in its former home, yet the 1859 1860 1861 1866 1869
OMIT 1872

manner. 1859 1860 1861 1866 1869
manner, although the climate may be exactly the same as in its former home. 1872

we wished to increase 1859 1860 1861 1866 1869
OMIT 1872

in 1859 1860 1861 1866 1869
are to increase in 1872

done 1859 1860
to do 1861 1866 1869
had to do 1872

any form some 1859 1860 1861 1866 1869
to any one species an 1872

do, so as to succeed. 1859 1860 1861 1866 1869
do. 1872

It will 1859 1860 1861 1866 1869
This ought to 1872

seems to be 1859 1860 1861
seems 1866 1869
is 1872

into slightly hotter or colder, damper or drier districts. In this case we can clearly see that if we
wish
wished
in imagination to give the plant the power of increasing in number, we should have to give it some advantage over its competitors, or over the animals which
prey
preyed
on it. On the confines of its geographical range, a change of constitution with respect to climate would clearly be an advantage to our plant; but we have reason to believe that only a few plants or animals range so far, that they are destroyed
exclusively by
by
the rigour of the
climate.
climate
alone.
alone.
Not until we reach the extreme confines of life, in the
Arctic
arctic
regions or on the borders of an utter desert, will competition cease. The land may be extremely cold or dry, yet there will be competition between some few species, or between the individuals of the same species, for the warmest or dampest spots.
Hence
Hence,
also,
also,
we can see that when a plant or animal is placed in a new country amongst new competitors,
though
though
the climate may be exactly the same as in its former home, yet the conditions of its life will generally be changed in an essential manner. If we wished to increase its average numbers in its new home, we should have to modify it in a different way to what we should have done in its native country; for we should have to give it some advantage over a different set of competitors or enemies.
It is good thus to try in
our
our
imagination to give any form some advantage over another. Probably in no single instance should we know what to do, so as to succeed. It will convince us of our ignorance on the mutual relations of all organic beings; a conviction as necessary, as it seems to be difficult to acquire. All that we can do, is to keep steadily in mind that each organic being is striving to increase
in
at
a geometrical