Scientists estimate that the fossils found so far represent probably ____ of all species that have ever lived.
A) 1%
B) 25%
C) 40%
D) 60%
E) 75%

Question

Scientists estimate that the fossils found so far represent probably ____ of all species that have ever lived.​
A) ​1%
B) ​25%
C) ​40%
D) ​60%
E) ​75%

Quizplus · Accepted Answer

Scientists estimate that the fossils discovered so far represent only about 1% of all species that have ever lived, due to the rarity of fossilization and the vast number of species that have existed over Earth's history.

Scientists Estimate That the Fossils Found So Far Represent Probably