12. How did Darwin reach the
principle of natural selection
from the observation of
differences among individuals
of the same species?

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Darwin recognized that in same
species there were with
different characteristics. He realized
that those differences lead to
different survival reproduction
chances for each . Therefore
he discovered the of the
environment acting organisms and
preserving those more
advantageous characteristics for
and more able to
offspring and so he the basis
of the of natural selection.