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VWO 3 evolution and ecology
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Slide 1:
Diapositive
Biologie
Middelbare school
havo, vwo
Leerjaar 2
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Slide 1 - Diapositive
Evolution
Slide 2 - Diapositive
After today
You can describe the theory of evolution by using the key concepts.
Key concepts:
Evolution – variation – natural selection – changes of survival – isolation.
Slide 3 - Diapositive
Slide 4 - Vidéo
Evolution has to do with ..
Slide 5 - Carte mentale
Evolution is about...
The emergence of new species (all organisms)
The way in which these species arise
Determining which species are related to each other
Slide 6 - Diapositive
Evolution is
NOT
about ..
How life came to be
How the universe/solar system/earth/etc. came to be
If God exist
Slide 7 - Diapositive
3 main mechanisms
Evolution can be summarized into these 3 mechanisms:
Variation in genotypes
Natural selection
New species arise
Slide 8 - Diapositive
What are the causes of genetic variation?
Slide 9 - Question ouverte
Variation in genotypes
Sexual reproduction > new/different genotypes
New genotypes > new phenotypes
Mutations also create new variation
Slide 10 - Diapositive
Slide 11 - Vidéo
Natural selection
Species who have adapted to
their environment will survive
and reproduce
'Good' genes are passed on
'Bad' genes dissapear
Slide 12 - Diapositive
New species arise
Animals of same species are split up
The environment slowly changes.
Because of natural selection, other genes are 'good' in new environment
Species have become different species after many years of evolution, due to living apart
more examples
Slide 13 - Diapositive
New species arise
New species arise due to
LONG
periods of evolution in a species
Many small changes together become big changes
Evolution takes very long! (thousands of years)
Slide 14 - Diapositive
Summarizing
Genetic variation created by mutation and recombination variation
Variation is passed on heredity
Environment select survivors
Survival of the fittest
Slide 15 - Diapositive
What is the deciding 'thing' that tells you that two organisms belong to the same species?
Slide 16 - Question ouverte
Different species?
Slide 17 - Diapositive
Start working
Homework
Theme 5 Heredity and evolution
Basic 4
1,2, 3, 5, 7 and 8
Slide 18 - Diapositive
Agenda
Homework check
Short recap basic 4
Instruction basic 5
Homework
Finishing Freek Vonk college
Slide 19 - Diapositive
Adaptation
the adjustment of organisms to their environment in order to improve their chances at survival in that environment.
Slide 20 - Diapositive
Put in the right order of natural selection
Adaptation
Selection
Variation
Slide 21 - Question de remorquage
Remember?
Describe what is happening here.
Use the words: variation, natural selection, survival of the fittest.
Slide 22 - Diapositive
Recap
Genetic variation created by mutation and recombination variation
Variation is passed on heredity
Environment select survivors
Survival of the fittest
Slide 23 - Diapositive
Basic 5 the history of life on earth
Slide 24 - Diapositive
After today you..
can explain how fossils arise
Can explain that species are related to a common ancestor
Slide 25 - Diapositive
Geological timescale
Divided into time periods
Each with distinctive climate
What is the evidence behind?
Slide 26 - Diapositive
By fossils
Slide 27 - Diapositive
Requirements of fossils
Time
Sediment
No oxygen
Slide 28 - Diapositive
Ammonite
Slide 29 - Diapositive
Common ancestor
Slide 30 - Diapositive
Kinship of species
The amount you are related to a common ancestor
Is the following statement true or false?
Cebochoerus is the ancestor of the whole pig family.
Slide 31 - Diapositive
Similarity in structures
organs can have the same structure but very different functions
Most probably come from (derived) from the same original structure
These animals therefore probably have a common ancestor
Slide 32 - Diapositive
Rudimentary organs
Slide 33 - Diapositive
Slide 34 - Vidéo
Homework
Theme 5
Basic 5
Question: 2,5,6,7
Slide 35 - Diapositive
Slide 36 - Vidéo
5 causes of evolution
Small population: shrinkage of alleles frequencies
Non random mating: sexual preferences
Mutations: lead to new genotypes and phenotypes
gene flow: migration of genes
Natural selection: environment filters genes
Slide 37 - Diapositive
Evolution RECAP
Groups of 4
multiple rounds of questions and topics
Who will win the prize
Slide 38 - Diapositive
Slide 39 - Diapositive
Slide 40 - Vidéo
What you should do:
Read lesson material 5.4
Do asgmt 1-3, 5,6,7
Challenge yourself: 8, 9
Done with the above?
Learn for the test
Make other homework
Read a book
Working with whispering
Teacher is available for questions
Only
whisper with the student next to you
Stay at your
desk
Slide 41 - Diapositive
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