Question

_____ % of all species that have lived on earth are now extinct.

a. <1
b. <10
c. <50
d. >99

Answer 1

The Answer is D. >99

Step-by-step explanation:

Of all species that have existed on Earth, 99.9 percent are now extinct. Many of them perished in five cataclysmic events. According to a recent poll, seven out of ten biologists think we are currently in the throes of a sixth mass extinction. Some say it could wipe out as many as 90 percent of all species living today. Yet other scientists dispute such dire projections.

Answer 2

The answer would be D.