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Transcript
Key insights that led Darwin to the
theory of evolution:

Artificial selection- Darwin noticed a lot of variation of
traits in domesticated animals and plants. Humans can
increase the chances of certain traits being passed down.

Heritability – Natural Selection can only act on traits that
already exist. Traits must be heritable in order to be
passed down

Struggle for survival – There is only so much food and
resources available so only the most “fit” survive.