(macroevolution) (1). developed the theory of evolution by observing animals on the galapagos...
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(Macroevolution)
(1)
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Developed the theory of evolution by observing animals on the Galapagos Islands
Wrote a book Origin of Species to describe his theory
(2)
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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.
(3)
Which dog should live in
each environment?
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Darwin’s Finches
http://www.brainpop.com/science/
ecologyandbehavior/naturalselection/
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Every once in a while there are changes in DNA bases – mutations
Mutations can cause misreading of DNA
(4)
Statistical Chances of a Mutation Occurring to One
Nucleotide is 1/109
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Mutations cause mostly bad disorders, but every once in a while there may be a non-harmful mutation
Always remember that mutations are random events!
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A trait (caused by a mutation) that allows an organism to have a better chance of survival
(5)
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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 pre-existing genetic
information.
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Any animal that can not survive in the environment will go extinct.
(6)