1. What does the term evolution mean? 2 definitions are acceptable- the one in your text, and the one I gave you in class.

2. Explain how natural selection works.

3. What is the original source of genetic variation in a population?

4. What is biological diversity or biodiversity?

5. How many species have been described? What is a reasonable estimate for the number of species on the planet?

6. What does speciation mean?

7. What conditions may cause it to happen?

8. What is the effect of geological or geographic barriers in speciation?

9. What does extinction mean?

10. What intrinsic characteristics make a species more vulnerable to extinction?

11. What external factors may cause a species to go extinct?

12. Which of these may have contributed to the extinction of the Golden Toad/

13. What does endemic mean?

14. Know the terms- habitat and niche. What do we mean by "empty niche"?

15. What is the definition of population?

16. What is population density?

17. What is an age structure diagram?

18. What do we mean by age class?

19. What simple equation expresses population growth?

20. What is exponential growth?  Under what conditions may it occur in natural populations?

21. What do we mean by limiting factors? What is another term for limiting factors?

22. What is logistic growth?

23. How do density dependent factors contribute to logistic growth?

24. What is "carrying capacity"?   What might cause it to change?

25. What does biotic potential mean?

26. What are the characteristics of K-strategists? What type of growth curve would be typical?

27. What are the characteristics of r- strategists?  What types of growth curves would be typical?