3 24 evidence for evolution
TRANSCRIPT
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Launch
Evolution is all around us in society. Pick one example of how you can see the
concept of evolution in society and explain the different levels.
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Quiz Results
B1- 80% B2- 80% B3- 80% B5
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New Quiz Set-up
Tuesdays will be content quizzes Thursday will be vocab quizzes
Definitions, examples, non-examples
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Fossil Evidence
Shows numbers of extinct animals Shows similarities between extinct
animals and animals that are alive today The earth’s layers show a time scale of
species and when they appeared on earth (and when they died out)
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Picture of Fossil
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Homologous structures
Structures that have the same/similar function that came from a common ancestor
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Analogous Structures
Structures that have the same function, but evolved separately.
Ex: The wings in
dinosaur bats and birds
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Vestigial Structures (Organs) Organs or parts that seem to have no
longer have a function
Whales have pelvic bones that do not attach to legs
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Biochemistry and DNA
When comparing the DNA of one species to another, more similarities are found in species that are more closely related
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Embryological Development
Embryos of different species develop in almost identical ways.
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Apply your knowledge
How might using anti-bacterial lotions and hand sanitizers be the theory of evolution in action?
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YouTube
http://www.youtube.com/watch?v=F1ucXmzcfmI
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Vocab
vestigial structure homologous structure analogous structure evolution loss-of-function
mutation gain-of-function
mutation beneficial mutation negative mutation
Theory Creationism/
Intelligent Design heritable mutagen genetic variation somatic mutation germline mutation homologous
chromosome crossing over