1. WHAT INFORMATION GIVES US EVIDENCE OF EVOLUTION?
embryology
genetics
WHAT INFORMATION GIVES US EVIDENCE OF EVOLUTION?
fossils
adaptations
biochemistry
anatomy

2. Evidence for Evolution
discussion: What is evidence?

3. 1. ADAPTATIONS
AN ADAPTATION IS ANY Genetic VARIATION THAT AIDS AN ORGANISM’S CHANCES OF SURVIVAL IN ITS ENVIRONMENT.

4. FOR EXAMPLE – A GIRAFFE’S NECK
STRUCTURAL ADAPTATIONS
FOR EXAMPLE – A GIRAFFE’S NECK
venus fly trap
venus fly trap 2

5. MIMICRY
A STRUCTURAL ADAPTATION THAT ENABLES ONE SPECIES TO RESEMBLE ANOTHER SPECIES.
Two Types:
Batesian– viceroy butterfly
Mullerian– wasps, bees, etc.

6. CAMOUFLAGE
Photo courtesy David Parks A cryptic frog - This species has developed a coloring, texture and form that are similar to the leaves found in its environment.
A STRUCTURAL ADAPTATION THAT ENABLES A SPECIES TO BLEND WITH THEIR SURROUNDINGS.

7. Fossil: A remnant or trace of an organism from long ago…
2. FOSSILS
Fossil: A remnant or trace of an organism from long ago…
TRACE FOSSILS
CASTS
PETRIFIED FOSSILS

8. IMPRINTS
AMBER PRESERVED
FROZEN
MOLDS

9. HOMOLOGOUS STRUCTURES
3. ANATOMY
HOMOLOGOUS STRUCTURES
VS.
ANALOGOUS STRUCTURES

10. HOMOLOGOUS STRUCTURES
Structures with a common origin that are similar, but modified for function
HOMOLOGOUS STRUCTURES
Alligator
Cat
Whale
Bird
Human
Bat

11. Similar function, but different origin
Analogous Structures
Example – wings on a bird, bat, & butterfly

12. FISH CHICK PIG HUMAN 4. EMBRYOLOGY
THE SIMILARITIES AMONG THE YOUNG EMBRYOS SUGGEST EVOLUTION FROM A DISTANT, COMMON ANCESTOR.
FISH
CHICK
PIG
HUMAN

13. 5. BIOCHEMISTRY
DNA Fingerprinting
Comparisons of the DNA, RNA, or proteins of different species produce biochemical evidence for evolution.

14. End of evidence portion
These next slides were originally the beginning of the presentation. (Darwin and Natural selection) Used other ppt. for this part.

15. EVOLUTION

16. THE THEORY OF EVOLUTION
CHARLES DARWIN

17. The voyage of the HMS Beagle
1831, when Darwin was 21 years old

18. CHARLES DARWIN
WAS A NATURALIST WHO STUDIED & COLLECTED BIOLOGICAL SPECIMENS AT EVERY PORT ALONG THE SHIP’S ROUTE.

19. DARWIN’S OBSERVATIONS LED HIM TO CONSIDER THE POSSIBILITY THAT SPECIES CAN CHANGE OVER TIME.
HIS IDEA WAS CALLED:
NATURAL SELECTION

20. Species change over time
NATURAL SELECTION
Species change over time
Organisms produce more offspring than can survive.
2. In any population individuals have variations.
3. Individuals with certain useful variations survive in their environment, passing those variations to the next generation.
4. Over time, offspring with certain variations make up most of the population and may look entirely different.

21. MECHANISM FOR CHANGE IN POPULATIONS
NATURAL SELECTION
MECHANISM FOR CHANGE IN POPULATIONS