What is the Estimated Percentage of Microbial Species on Earth

Question

What is the estimated percentage of microbial species on Earth have been grown in culture?
A)1 -5%
B)5 - 10 %
C)10 - 15%
D)15-20%
E)20 - 25%

Accepted Answer

Only a small fraction of microbial species on Earth have been successfully cultured in laboratory conditions. The vast majority of microbial species remain uncultured and their characteristics and functions remain unknown.