5.03 evolution evidence

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Do Now: 1.Who is the scientist who provided evidence for evolution?

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Page 1: 5.03 Evolution evidence

Do Now:

1.Who is the scientist who provided

evidence for evolution?

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EvolutionEvolutionObjective:Objective:

•You will be able to state the types of evidence You will be able to state the types of evidence supporting evolution.supporting evolution.

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EVIDENCE FOR EVOLUTIONEVIDENCE FOR EVOLUTION

1. Fossils in the fossil record

2. Vestigial Structures

3. Similar skeletal structures (bones)

4. Similar DNA

5. Similar embryonic structures (before born)

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Word Definition Picture

1. Fossils Solidified remains or imprints of once-living organisms

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How does a fossil form?How does a fossil form?

Fossil is exposed

Covered by sediment

Minerals replace remains

Minerals still replacing remains, layers disturbed

Organism dies

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Plant fossils

Fossilized skin

Ancient mosquito preserved in amber

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Which fossil is the oldest and why?

A

B

C

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Evidence?Evidence? What is it?What is it? PicturePicture

2. Ancestor

Early form of an organism from which

later forms are descended from

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Evidence?Evidence? What is it?What is it? PicturePicture

3. Extinct

When a group of organisms die out and none are left!

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Word Definition Picture

4. Vestigial Structures

A body structure that is no longer used and is used as evidence for

evolution

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Evidence?Evidence? What is it?What is it? PicturePicture

Vestigial Structures

Show that they evolved from needing them.

Examples: leg bones in whales and the human tail

bone

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Evidence?Evidence? What is it?What is it? PicturePicture

5. Similar skeletal structures

Many bones in arms, legs, flippers, and

wings are very similar.

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Evidence?Evidence? What is it?What is it? PicturePicture

4. Similar DNA

All organisms have DNA and organisms that

look similar have very similar DNA.

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Similarities in DNASimilarities in DNA

Example: elephant shrew (rodent) and elephant – DNA proved that the shrew is closer related to elephant than to mice

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Evidence?Evidence? What is it?What is it? PicturePicture

7. Similar Embryonic Structures

Before organisms are born, many look very similar.

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Similarities in Early DevelopmentSimilarities in Early Development

1. Adults of different species look very different

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2. Similarities in the shapes and structures when an embryo is in early development

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Dolphin embryo

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Is evolution happening now?Is evolution happening now?

Yes, scientists have observed many examples of species changing today:

• People are getting larger

• Peppered moths have changed color

• Bacteria are becoming resistant to drugs

• Insect pests become immune to poisons

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AssignmentAssignment• Make up a creative newspaper article that

includes all 5 types of evidence for evolution. Include at least one picture.

• Sample evolution article ideas (pick one if you can’t come up with your own idea!):– An evolution professor comes to Liberty to talk about

the evidence for evolution (what will he talk about?)– A new fossil is found and then used as evidence for

evolution (what other types of evidence is there?)– A new movie has come out and it’s about evolution

(what types of evidence does it talk about?)

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AssignmentAssignment• Create a collage explaining evolution and the 5

different types of evidence for it.• EXAMPLE: fossils

Similarbones

Vestigial Structures

Similar Embryo Development

Similar DNA

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Fold your paper into 6 strips.Fold your paper into 6 strips.

• Label the first box “Evidence for Evolution”

• List each of the 5 types of evidence in the other boxes.

• Draw a picture for each type of evidence.