1. 1
Habitat A
Habitat C
Habitat B
Habitat D
Region X
Region Y

2. 2
Habitat A
Habitat C
Habitat B
Habitat D
Region X
Region Y

3. 3 A B
C. Neither, they are equal.

4. 4

5. 5

6. 6

7. 7

8. 8

9. 9

10. 10

11. 11 11

12. 12

13. 13

14. 14

15. 15 A B

16. 16
Extinction is not necessarily easy to conclude. Sometimes species thought to be extinct are still present in small isolated populations

17. 17
Comparison of species richness among wildlife parks. Color code: yellow = 1896–1950, green = 1950–2013. Species richness (the number of species) higher today. Why?

18. 18