I. Resources

2. I. Resources A. Recall that… resources are available to meet theneeds and wants of living things. 1. In other words, these resources provide living things with the matter and energy they need to survive and reproduce. B. What are they? 1. Consider what living things need to survive. 2. List them. 3. Next to each need, write whether it is a renewable, non-renewable, or potentially renewable resource.

3. Example Needs: Food-potentially renewable Air -potentially renewable Water -potentially renewable Shelter -potentially renewable/ non-renewable Energy- non-renewable, renewable, non-renewable

4. II. Populations A. What is a population? 1. 2.

5. III. Population Growth A. How are populations affected by resources? 1. Resources determine how a given population will grow. B.

6. 1.

7. 2.

8. 3. a. Populations grow when birth rate+immigration rate (# of organisms moving into a population) >death rate+ emigration rate (# of organisms moving out of a population)

9. IV. Limiting Factors A. 1. Resources, nutrients (matter) and energy in short supply, limit how large a population can grow, therefore resources can be limiting factors.

10. B. 1. Density-dependent limiting factors control population size when a population is large and crowded. a. examples: competition, predation, parasitism and crowding 2. Density-independent limiting factors control population size regardless of whether a population is large or small. a. examples: natural causes such as geothermal activity, extreme weather

11. V. Carrying Capacity & Pop. Growth A.

12. B.

13. C.

14. Another example would be… …yeast cultures in a test tube.

15. D. 1.

16. 2. C. A. B.