VWO 3 evolution and ecology

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Slide 1: Tekstslide
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In deze les zitten 41 slides, met interactieve quizzen, tekstslides en 5 videos.

time-iconLesduur is: 45 min

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Slide 1 - Tekstslide

Evolution 

Slide 2 - Tekstslide

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 - Tekstslide

Slide 4 - Video

Evolution has to do with ..

Slide 5 - Woordweb

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 - Tekstslide

Evolution is NOT about ..
  • How life came to be
  • How the universe/solar system/earth/etc. came to be
  • If God exist

Slide 7 - Tekstslide

3 main mechanisms
Evolution can be summarized  into these 3 mechanisms:
  1. Variation in genotypes
  2. Natural selection
  3. New species arise

Slide 8 - Tekstslide

What are the causes of genetic variation?

Slide 9 - Open vraag

Variation in genotypes
  • Sexual reproduction > new/different genotypes
  • New genotypes > new phenotypes
  • Mutations also create new variation

Slide 10 - Tekstslide

Slide 11 - Video

Natural selection
  • Species who have adapted to 
        their environment will survive
        and reproduce
  • 'Good' genes are  passed  on
  • 'Bad' genes dissapear

Slide 12 - Tekstslide

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 - Tekstslide

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 - Tekstslide

Summarizing
Genetic variation created by mutation and recombination  variation

Variation is passed on  heredity
Environment select survivors
Survival of the fittest



Slide 15 - Tekstslide

What is the deciding 'thing' that tells you that two organisms belong to the same species?

Slide 16 - Open vraag

Different species?

Slide 17 - Tekstslide

Start working
Homework
Theme 5 Heredity and evolution
Basic 4
1,2, 3, 5, 7 and 8

Slide 18 - Tekstslide

Agenda
  • Homework check
  • Short recap basic 4 
  • Instruction basic 5
  • Homework
  • Finishing Freek Vonk college 

Slide 19 - Tekstslide

Adaptation
the adjustment of organisms to their environment in order to improve their chances at survival in that environment.

Slide 20 - Tekstslide

Put in the right order of natural selection
Adaptation
Selection
Variation

Slide 21 - Sleepvraag

Remember?
Describe what is happening here. 
Use the words: variation, natural selection,  survival of the fittest.

Slide 22 - Tekstslide

Recap
Genetic variation created by mutation and recombination  variation

Variation is passed on  heredity
Environment select survivors
Survival of the fittest



Slide 23 - Tekstslide

Basic 5 the history of life on earth 

Slide 24 - Tekstslide

After today you..
can explain how fossils arise 
Can explain that species are related to a common ancestor

Slide 25 - Tekstslide

Geological timescale
Divided into time periods
Each with distinctive climate

What is the evidence behind?

Slide 26 - Tekstslide

By fossils

Slide 27 - Tekstslide

Requirements of fossils
  • Time
  • Sediment 
  • No oxygen

Slide 28 - Tekstslide

Ammonite

Slide 29 - Tekstslide

Common ancestor

Slide 30 - Tekstslide

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 - Tekstslide

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 - Tekstslide

Rudimentary organs

Slide 33 - Tekstslide

Slide 34 - Video

Homework 
Theme 5
Basic 5 
Question: 2,5,6,7 

Slide 35 - Tekstslide

Slide 36 - Video

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 - Tekstslide

Evolution RECAP
Groups of 4 
multiple rounds of questions and topics
Who will win the prize

Slide 38 - Tekstslide

Slide 39 - Tekstslide

Slide 40 - Video

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 - Tekstslide