What proportions of all species that ever lived has become extinct?
A. less than 1 percent
B. approximately one-half
C. more than 99 percent
D. 100 percent
Answer: C. more than 99 percent
What proportions of all species that ever lived has become extinct?
A. less than 1 percent
B. approximately one-half
C. more than 99 percent
D. 100 percent
Answer: C. more than 99 percent