2. When was it believed that One Tree Island was created?
(a) 3,500 years ago.
(b) 4,000 years ago.
(c) 7,500 years ago.
(d) 11,000 years ago.

3. For his genome project, how many bones was Paaba able to obtain?
(a) 9.
(b) 11.
(c) 14.
(d) 21.

4. In the BDFFP's study plots, how many species of trees have been identified?
(a) 1,400.
(b) 1,600.
(c) 1,200.
(d) 1,300.

5. Where was Bardsey Island located?
(a) Wales.
(b) Scotland.
(c) Ireland.
(d) Britain.

6. In Chapter 7, by what percent did a study by Australian researchers find that the Great Barrier Reef had declined in the last thirty years?
(a) 35.
(b) 30.
(c) 50.
(d) 45.

7. In an average day, how many pounds of ficus leaves would Suci eat?
(a) 15.
(b) About 50.
(c) 35.
(d) About 100.

8. From a single species of tree, how many species of beetles had entomologist Terry Erwin collected?
(a) 814.
(b) 1,045.
(c) 789.
(d) 950.

9. When was it believed that the Neanderthal vanished?
(a) 30,000 years ago.
(b) 25,000 years ago.
(c) 15,000 years ago.
(d) 20,000 years ago.

10. In Chapter 11, how many Javan rhinos were believed to be left?
(a) Less than 50.
(b) 16.
(c) 22.
(d) About 30.

11. In a cave in Vermont, how many bat corpses piled up on the ground after they were affected by "Geomyces destructans"?
(a) Hundreds.
(b) 450.
(c) Thousands.
(d) 350.

12. How many prey could a colony of army ants on the march consume per day?
(a) 5,000.
(b) 11,000.
(c) 75,000.
(d) 30,000.

13. When was a nearly complete Neanderthal skeleton found in a cave in southern France?
(a) 1911.
(b) 1908.
(c) 1907.
(d) 1903.

14. When Cohn-Haft and his colleagues banded birds across the reserve, how many did they band?
(a) 8,000.
(b) 13,000.
(c) 11,000.
(d) 25,000.

15. On the Great Barrier Reef, how large were the sea cucumbers?
(a) Size of a children's table.
(b) Size of bolster cushions.
(c) Size of a swim tube.
(d) Size of cucumbers.