Context: Rapid environmental changes typically cause mass extinctions. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037, and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).

Question: What can typically cause mass extinctions?
Answer: Rapid environmental changes

Question: What percentage of species is estimated to be extinct?
Answer: More than 99 percent

Question: How many species have ever lived on earth?
Answer: over five billion species

Question: How many species currently live on earth?
Answer: Earth's current species range from 10 million to 14 million,

Question: What is the estimated weight of the total amount of related DNA base pairs on Earth?
Answer: 50 billion tonnes

Question: What can typically cause the biosphere?
Answer: Unanswerable

Question: What percentage of DNA base pairs are estimated to be extinct?
Answer: Unanswerable

Question: How many DNA base pairs have ever existed?
Answer: Unanswerable

Question: How many DNA base pairs are on earth?
Answer: Unanswerable

Question: What is the estimated weight of the total amount of species on Earth?
Answer: Unanswerable