BS5.4 Evolution

• Biologie
• Middelbare school
• havo
• Leerjaar 3

BS5.4 Evolution

Who is this?

Learning goal

You can describe the theory of evolution.

natural selection

Evolution

The development of life on Earth, with species appearing and changing and/or disappearing

Species (soorten) that are better addapted to their environment survive and produce more offspring (nakomelingen).

Giraffes with long necks have a higher chance to survive and therefore reproduce

Evolution in Steps

1. There is variation between individuals within one species 'genetic variation'.
   
2. Individuals with an advantage have a higher chance of surviving ' natural selection' 
   
3. The individuals that survive will have a higher chance to produce offspring 
   

Natural selection

Explain... (use the words: variation, natural selection, chance of survival, offspring) 

Get to work

Make ex. 1, 3, 7 and 9 (of BS5.4)

The development from Caterpillar to butterfly is an example of evolution.

1. Ofcourse!
2. Nooooo!

Wat is de beste omschrijving van evolutie?

1. Evolutie is een geleidelijke ontwikkeling, waarbij steeds ingewikkelder gebouwde organismen ontstaan.
2. Evolutie is de ontwikkeling van het leven op aarde, waarbij soorten ontstaan, veranderen en/of verdwijnen.
3. Evolutie is het ontstaan van een nieuwe soort, doordat een andere soort uitsterft.
4. Evolutie is de ontwikkeling van het leven op aarde doordat organismen zich aanpassen aan hun milieu.

Lesson 2

Planning

Recap natural selection

Instruction: how new species arise 

Assignments book 

Closure 

Recap 

The desert fox is descended from the common foxes that live in temperate climates. Long ago, a group of foxes went into the Sahara and evolved into the desert fox. Explain how the evolution into a desert fox progressed.

Use the following terms in your explanation: genotype – mutation – natural selection – variation

Answer

There was variation in foxes. Variation in genotype is caused for example by mutations. Variation in genotype meant that some animals had favourable characteristics for surviving in the desert. These favourable characteristics were passed on to the next generations. Animals with more favourable characteristics survived and were able to reproduce. Natural selection gradually changed the species.

Questions for during the video

1. What defines a species?

2. How can species become isolated from each other?

Questions for during the video

1. What defines a species?

2. How can species become isolated from each other?

3. How can isolation lead to different species?

Get to work

BS5.4, make ex. 2, 6 and 8