Similarities are noticed Does a sheep

Brain resemble a human brain?

Are sheep and humans related?

Similar “arms” and fingers People have noticed

similarities between species

Are all these organisms related?

Similar Eyes Model of a sheep eye

also works for cow eye and human eye.

frog eye, cat eye, etc… Could we be related?

Similar cells Even at the cell level

there are many similarities between all animals.

Are all animals related?

Comparison of mouse and elephant Warm blooded Red and white BC Body hair Produce milk for young 4-chambered heart Lungs Pancreas Lg and small intestine 2 eyes Etc…..

Ribs

Vertebrae

4 legs

Are mice and elephants closely related?

DNA is identical DNA for ALL

species uses the same code.

DNA from one species works in another species

Are we all related?

DNA from one species will work in another species This mouse has a

gene from a jellyfish in each of his cells. The jellyfish gene is the recipe for a glow in the dark protein.

Why does DNA from one species work in another?

Variety of types There are almost

always many species of one TYPE of creature.

Many species of butterfly

WHY???

Many species of one TYPE Some fish species in

North America Are they closely

related? Do they come from

the same ancestors?

ARCHAEOPTERYX

WHAT HAVE YOU HEARDABOUT EVOLUTION?

Make a KWL Chart

Get one Give One

Archaeopteryx

Did birds evolve from small meat-eating dinosaurs?

Could this creature be

the missing link between dinosaurs and birds?

ARCHAEOPTERYX A second

archaeopteryx fossil

ARCHAEOPTERYX Artists

reconstruction

Of what advantage would feathers be in the struggle to survive?

CHARLES DARWIN Charles Darwin

              

                     

Darwin supported by most Scientists todayDarwin:

Hero of Science and Reason?

Charles Darwin Laughing stock? Why were his ideas

controversial?

WHY SO MANY SPECIES? http://bugguide.net/node/view/60

Oldest Fossils ever found. Single Cells. Western Australia 3.4 Billion years old.

Fossil Stromatolites.. Some of the 1st evidence of life on earth

“living” stromatolites Australia

Stromatolites layers visible in cut-rock

Stromatolites visible at very high altitude

Dunkleostus from Lake Erie. Believed to have preyed upon sharks