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7.2-7.4 evidence for evolution
The Development of Life: Evolution
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vwo
Leerjaar 4
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The Development of Life: Evolution
Slide 1 - Diapositive
Slide 2 - Diapositive
How old is the Earth?
Slide 3 - Carte mentale
How many years ago life originated on Earth?
Slide 4 - Carte mentale
Slide 5 - Vidéo
Geological time scale
Earth came into being approximately 4,6 * 10^9 years ago
First single-celled organisms emerged approx. 3.8 * 10 ^ 9 years ago in the PRECAMBIUM
First multicellular organisms emerged approx. 670 * 10 ^ 6 years ago
First land plants: approx. 400 * 10 ^ 6 years ago in DEVOON
First vascular plants: approx. 350 * 10 ^ 6 years ago
First dinosaurs (reptiles): approx. 250 * 10 ^ 6 years ago in the MESOZOICUM (Triassic, Jurassic and Cretaceous)
Mass extinction dinosaurs: 65 * 10 ^ 6 years ago; start CENOZOICUM, mammals become dominant
First hominins: approx. 5 * 10 ^ 6 years ago
Slide 6 - Diapositive
Slide 7 - Diapositive
Slide 8 - Diapositive
Slide 9 - Vidéo
Slide 10 - Diapositive
Slide 11 - Diapositive
Slide 12 - Diapositive
Slide 13 - Diapositive
Interesting structures
Homologous: divergent evolution
similar origin, different function
Analogous: convergent evolution
different origin, similar function
Slide 14 - Diapositive
Vestigial organs
No apparent function, residual parts of an ancestor
Slide 15 - Diapositive
Slide 16 - Diapositive
Memphis Depay
Slide 17 - Diapositive
Species
A group of organisms with similar features which can interbreed to produce
fertile
offspring, and which are
reproductively isolated
from other species
Slide 18 - Diapositive
Speciation:
1. part of a population becomes separated from the rest of the species.
2. adaptation to different environmental conditions.
3. reproductive isolation. As long as the two groups interbreed they share the same gene pool and remain the same species.
Slide 19 - Diapositive
Phylogenetic tree
Slide 20 - Diapositive
Tips for reading trees
Same, but different style
Same, but turned at
branching point
Slide 21 - Diapositive
Slide 22 - Diapositive
Work to be done
7.2-7.4 : Questions 19 – 22, 24 – 26, 28 – 34
and Concept lists 7.2, 7.3 and 7.4
Slide 23 - Diapositive
Slide 24 - Diapositive
Slide 25 - Diapositive
Slide 26 - Vidéo
Question:
What is the evidence for evolution? Watch the video and write down the evidence they found that supports the theory of evolution.
Slide 27 - Diapositive
Question:
What is the evidence for evolution? Watch the video and write down the evidence they found that supports the theory of evolution.
Slide 28 - Diapositive
Great similarity between species implies
A
Recent common ancestry
B
Remote common ancestry
C
Succesfull reproduction
D
Extinction
Slide 29 - Quiz
According to this tree, sharks are MOST closely related to which organism?
A
amphibians
B
ray-finned fish
C
primates
D
birds
Slide 30 - Quiz
According to this tree, birds are LEAST closely related to which organism?
A
amphibians
B
ray-finned fish
C
primates
D
sharks
Slide 31 - Quiz
What is the most recent common ancestor of C and D?
A
1
B
2
C
3
D
4
Slide 32 - Quiz
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