1. 4:2 relate the adaptability of organisms in an environment to their inherited traits and structures

2. Poison Dart Frog

3. Darwin 1820 English, natural scientist
Why are organisms different?
Why are organisms similar?
Why are there so many different types of organisms?

4. Traits that offer survival

5. Traits that provide an advantage for survival in one environment but not other environments
CAMOUFLAGE ?
MIMICRY ?
Predator adaptation-helps capture prey
Prey adaptation-avoids predators

6. Flies acting like bees

7. What are these acting like?
Walking stick
Eastern Tiger Swallowtail Caterpillar

8. ADAPTATIONS (traits that allow for survival):
ANTIFREEZE FISH
ADAPTATIONS (traits that allow for survival):
ANTARCTIC TOOTHFISH
SLOW HEARTBEAT
LIVES 40 YEARS
200 LBS.
PROTEIN THAT ACTS LIKE ANTIFREEZE!

9. Traits
Inherited
Acquired

10. Natural selection
Some variation in inherited traits within the species
Some of these traits will give an advantage over others in surviving and reproducing
These will be more likely to have more offspring

11. Why so many species
Increases the chance that at least some organisms adapt and survive any major changes in the environment.

12. Artificial selection (manmade)
Dog breeds
Milk producers

13. Reproductive isolation
Allopatric-Geographic
Sympatric-Behavior

14. Structure and survival
Buoyancy needs less structural support

15. Structural adaptations for flight
Wings and hollow bones
Behavioral
Migration

16. Structural adaptations
Internal skeleton
Exoskeleton

17. Egg laying vs. live birth
Egg has nutrients until birth
Easier to lay eggs than carry that many
Protects from predators
Maintains constant temp. for survival