1. CH 7 SEC 3
EVOLUTION OF SPECIES

2. PICK 4 WORDS AND DEFINE

3. VARIETY OF SPECIES
HOW MANY MILLIONS OF SPECIES EXIST?
1.5 MILLION TO???
KEY- OVER TIME, DIFFERENT ENVIRONMENTS AND GENETIC VARIATION HAVE PRODUCED, THROUGH NATURAL SELECTION, THE VARIETY OF ORGANISMS THAT EXIST TODAY.

4. CONT’D
HABITAT- IS THE SPECIFIC ENVIRONMENT THAT PROVIDES THE THINGS AN ORGANISM NEEDS TO LIVE, GROW, AND REPRODUCE
KEY-A NEW SPECIES CAN FORM WHEN A GROUP OF ORGANISMS REMAINS ISOLATED FROM THE REST OF ITS SPECIES LONG ENOUGH TO EVOLVE DIFFERENT TRAITS.

5. CONT’D
GRAPHIC ISOLATION- IS WHEN SOME MEMBERS OF A SPECIES BECOME CUT OFF FROM THE REST OF THE SPECIES (SEE GALAPAGOS ISLANDS)

6. INFERRING SPECIES RELATIONSHIPS
KEY- SCIENTIST HAVE COMBINED THE EVIDENCE FROM DNA, PROTEIN STRUCTURE, FOSSILS, EARLY DEVELOPMENT AND BODY STRUCTURE TO DETERMINE THE EVOLUTIONARY RELATIONSHIPS AMONG SPECIES
KEY- SCIENTIST GROUP TOGETHER CLOSELY RELATED SPECIES

7. KEY- All these animals are closely RELATED. CAN YOU NAME THEM?

8. EXTINCTION OF A SPECIES
EXTINCT- WHEN NO MEMBERS OF A SPECIES ARE ALIVE (WOOLLY MAMMOTHS)
WHAT MAKES A SPECIES EXTINCT?
KEY- EXTINCTION IS CAUSED BY A CHANGE IN A SPECIES ENVIRONMENT. THE MEMBERS OF THE SPECIES MAY NOT HAVE ADAPTATIONS THAT ALLOW THEM TO SURVIVE AND REPRODUCE IN THE CHANGED ENVIRONMENT

9. WHY IMPORTANT?

10. NOW EXINCT

11. EXTINCTION

12. A NEW DISEASE EX- A NEW DEADLY VIRUS HAS WIPED OUT A TREE SPECIES
THERE ARE MANY WAYS EXTINCTION CAN HAPPEN…LIST THE FOLLOWING AND GIVE AN EXAMPLE FOR EACH
A NEW DISEASE EX- A NEW DEADLY VIRUS HAS WIPED OUT A TREE SPECIES
LOSS OF FOOD SOURCE EX?
PREDATORS KILL THEM OFF
HUMAN IMPACT
OVER HUNTING

13. LIST AND GIVE AN EXAMPLE
DESTRUCTION OF ENVIRONMENT
CLIMATE CHANGE
CATASTROPHIC EVENTS

14. Cont’d Climate Change- has been the leading cause of extinction
EX- an area that was once warm and moist becomes cool and dry
Resulting- in plants dying and the animals that feed on those plants dying as well or becoming extinct
KEY- SOME ORGANISMS IN A SPECIES MAY HAVE TRAITS THAT HELP THEM SURVIVE IN A CHANGED ENVIRONMENT.

15. HORSESHOE CRABS HAVE SURVIVED MANY CLIMATE CHANGES

16. HORSESHOE CRAB HOW OLD ARE THEY?

17. RECENTLY EXTINCT ANIMALS

18. LIST 4 ANIMALS ENDANGER OF EXTINCTION TODAY AND WHY

19. RACING EXTINCTION