1. Do now activity What is directional selection?
What is stabilizing selection?
What is disruptive selection?
Draw a graph of each type of selection and label the type of graph.

2. Do now activity How is the picture an example of genetic drift?
How is the picture an example of Founders Effect?
Genetic drift because the relative frequency changed from mutation at 4.5% to 20% to 41% (Total is 22) because of earthquake/death/etc.
Founders because Small group moved away so relative frequency of original population went from 4.5% to 0% mutation

3. Section 7-4: biodiversity
Essential Question:
What role do humans play in biodiversity?
Learning Target
Create a flow map that demonstrates the effect of an environmental change on a species. Extension: How does the change of one species impact other species within the same environment?
Explain the impact of human activity on the diversity of species. Examples can include: artificial selection and decreased genetic diversity.
Section 7-4: biodiversity

4. announcements Biology Tutoring this week:
Lunch B (Tuesday & Thursday)
7:00AM (Monday – Friday)
After school Biology Tutoring: Tuesday
Section 6 Quiz Retakes are available until 2/17/17.

5. announcements Available Extra Credit: Tissue Box = 2 Points
Starburst Original Jellybeans = 5 Points
Stauffer’s Original Animal Crackers = 10 Points

6. Don’t forget to chunk your notes!

7. overview Bio = Life Diversity: Variety
Biodiversity: variety of life in the biosphere

8. The variation of genes within a species is called _____ ______.
overview
The variation of genes within a species is called _____ ______.
Helps to prevent diseases

9. The variation of genes within a species is called genetic diversity.
overview
The variation of genes within a species is called genetic diversity.
Helps to prevent diseases

10. Artificial selection is when……???

11. Artificial selection
Artificial selection is when humans choose which animals get to reproduce.

12. Artificial selection
This decreases _____ _____ because only the variations useful to humans are chosen to reproduce.

13. Artificial selection
This decreases genetic diversity because only the variations useful to humans are chosen to reproduce.

14. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
habitats altered for housing, agriculture, or industry
habitat fragmentation: splitting a habitat into small fragments
the smaller the habitat fragment, the fewer the number of species
Habitat Fragmentation

15. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
invasive species: species that have migrated to places they are not native
also called exotic species
reproduce rapidly with no natural enemies, driving native species to extinction
Invasive Species

16. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
can alter habitats or kill species directly (Exxon Valdez)
bioaccumulation: the accumulation of many pollutants in the tissues of individual organisms
biomagnification: the multiplication of the effects of some pollutants as they work their way through the food chain
Bioaccumulation

17. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
can alter habitats or kill species directly (Exxon Valdez)
bioaccumulation: the accumulation of many pollutants in the tissues of individual organisms
biomagnification: the multiplication of the effects of some pollutants as they work their way through the food chain
Biomagnification

18. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
extinction: when the last member of a species dies
endangered species: a species whose population is declining and in danger of extinction
Extinction-1681

19. Human interference Altering habitats
Human activities that reduce biodiversity:
Altering habitats
Introducing foreign species into established food webs
Polluting ecosystems
Hunting species to extinction
extinction: when the last member of a species dies
endangered species: a species whose population is declining and in danger of extinction
Endangered Species

20. Human interference
DECREASES
Conservation: management and preservation of natural resources.