→ here alluded to them 1859 1860 1861 1866 |
made these remarks 1869 1872 |
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→ we 1859 1860 1861 1866 |
from one or a few parent-stocks, we 1869 1872 |
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and individuals with slightly different constitutions would succeed best under different
A good
states that in cattle susceptibility to the attacks of flies is correlated with colour, as is the liability to be poisoned by certain plants; so that
would be thus subjected to the action of natural selection. But we are far too ignorant to speculate on the relative importance of the several known and unknown
of variation; and I have
→here alluded to them
only to show that, if we are unable to account for the characteristic differences of our
breeds, which nevertheless
generally
to have arisen through ordinary
→we
ought not to lay too much stress on our ignorance of the precise cause of the slight analogous differences between
I might have adduced for this same purpose the differences between the races of man, which are so strongly
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