A) 3.5 billion years
B) 3.0 billion years
C) 2.5 billion years
D) 3.2 billion years
Correct Answer: A
Solution :
Life is believed to be originated in the ocean presumably about 3.7 billion years ago. The oldest known stromatolites (fossilized microbial mats) are found in a rock about 3.5 billion years old. The fossils of unicellular, simple, prokaryotic cyanobacteria like organisms (archaeobacteria) have been obtained from 3.2 billion year old rocks.
You need to login to perform this action.
You will be redirected in
3 sec
