1. Climate Change…What’s the BIG deal?
Evolution PART TWO
Macroevolution
Speciation
Basic Classification
Climate Change…What’s the BIG deal?

2. Change over TIME How did we go from genetic drift Within a species
(MICROEVOLUTION) to
Completely different species
(MACROEVOLUTION)?

3. Species Biological Species Concept:
Individuals from one species must interbreed AND produce offspring that reproduce!
Are the fruit flies in both pictures the same species?
How can you tell?
Problems with this concept?
Some species can interbreed
forming hybrids that may be able to
reproduce!
Some species reproduce
ASEXUALLY!

4. Speciation
When a species divides into two or more different species over time
Geographical
Barriers!
Reduction of
Gene Flow!
POSSIBLE CAUSES:

5. Geographical Barriers
An event causes a species to be physically divided
or isolated from each other for a LONG TIME!

6. Reduction of Gene Flow Cannot successfully reproduce anymore!
Jumping spider
Courtship rituals
differ!
Preference change!
Mating Seasons Different!
Reproductive organs change!
Migration Changes
Appear Different!

7. Two MODES of Speciation: Allopatry & Sympatry
Physical barrier induces
genetic isolation
Genetic isolation
occurs within a “pod”

8. Role of MUTATIONS
Polyploidy!
Coding error in
bases!
Common In
Plants!

9. Classification! Shows RELATIONSHIP and EVOLUTION of species!
Grouping & Ordering Organisms
Shows RELATIONSHIP and EVOLUTION of species!

10. Tree of LIFE!

11. New Evidence CAN change Tree of Life!
HOW DO SCIENTIST KNOW?
EVIDENCE BASED!
New Evidence CAN change Tree of Life!
Fossils!
Development!
Complexity!
DNA!

12. How do scientists classify organisms?
MOST Specific!
Organisms are classified
into groups & subgroups
based on similar
characterisitics
MOST General!

13. LIVING OR NOT?
NON-LIVING
LIVING = TREE OF LIFE

14. Nucleus or not? Eukaryotes! Prokaryotes! Also Prokaryotes
DOMAIN: ARCHAEA!
Salt & Heat
Loving microbes!
Nucleus or not?

15. 4 KINGDOMS!
Protists
Fungi
Animals!
Plants!