__________ play a key role in the transformation of rock to soil.
A. Cyanobacteia
B. Pectin decomposing bacteria
C. Nitrifying bacteria
D. De-nitrifying bacteria
Answer:A
__________ play a key role in the transformation of rock to soil.
A. Cyanobacteia B. Pectin decomposing bacteria C. Nitrifying bacteria D. De-nitrifying bacteria