Biological Classification And System Of Classification Question 56
Question: Cyanobacteria originated about how many years ago
[Pb. PMT 2000]
Options:
A) 1 billion
B) 2 billion
C) 3 billion
D) 4 billion
Show Answer
Answer:
Correct Answer: C
Solution:
Cyanobacteria was first microbes that produced oxygen by photosynthesis around 2.5 - 3.5 billion years ago on earth.
BETA
