What type of gas do cyanobacteria produce for planet Earth?
a. oxygen
b. hydrogen
c. nitrogen
d. carbon dioxide
e. water vapor
Answer: oxygen
What type of gas do cyanobacteria produce for planet Earth?
a. oxygen
b. hydrogen
c. nitrogen
d. carbon dioxide
e. water vapor
Answer: oxygen
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.