(1)
(Macroevolution)
(2)
 Developed the theory of
evolution by observing
animals on the
Galapagos Islands
 Wrote a book Origin of
Species to describe his
theory
(3)
 The environment plays a role in
which animals can survive and
which may die
 Ex. In the Arctic only dogs with
long, thick fur will survive.
Which dog should
live in each
environment?
Darwin’s Finches
http://www.brainpop.com/science/ecolog
yandbehavior/naturalselection/
(4)
 Every once in a while there
are changes in DNA bases –
mutations
 Mutations can cause
misreading of DNA
Statistical Chances of a Mutation Occurring
to One Nucleotide is 1/109
 Mutations cause mostly bad
disorders, but every once in a
while there may be a nonharmful mutation
Always remember that
mutations are random events!
(5)
A trait (caused by a
mutation) that allows an
organism to have a better
chance of survival
Adaptations are a
result of “beneficial”
mutations, these
mutations cause
changes in
organisms and allow
them to survive.
All organisms have a
mix of genes. Certain
environments cause
specific genes to be
chosen from preexisting genetic
information.
(6)
 Any animal that can not
survive in the environment
will go extinct.