Major natural extinctions are thought to have happened ________ in Earth history.
A) never
B) once
C) twice
D) three times
E) innumerable times
Question 2
The coconut palm is now widely dispersed in the world because of ________.
A) the ability of its coconut to float long distances
B) its ability to survive in the Tundra
C) rapid evolution
D) humans who have transplanted it
E) continental drift