3 24 evidence for evolution
TRANSCRIPT
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.
Quiz Results
B1- 80% B2- 80% B3- 80% B5
New Quiz Set-up
Tuesdays will be content quizzes Thursday will be vocab quizzes
Definitions, examples, non-examples
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)
Picture of Fossil
Homologous structures
Structures that have the same/similar function that came from a common ancestor
Analogous Structures
Structures that have the same function, but evolved separately.
Ex: The wings in
dinosaur bats and birds
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
Biochemistry and DNA
When comparing the DNA of one species to another, more similarities are found in species that are more closely related
Embryological Development
Embryos of different species develop in almost identical ways.
Apply your knowledge
How might using anti-bacterial lotions and hand sanitizers be the theory of evolution in action?
YouTube
http://www.youtube.com/watch?v=F1ucXmzcfmI
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