Microbiology of Soils
A heterocyst is

the progenitor of cyanobacterial vegetative cells
a cell that carries out oxygenic photosynthesis
a terminally differentiated cell that fixes nitrogen
a type of spore

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

conversion of ammonium ions into nitrates through the activities of certain bacteria.
None of these
sulfur is oxidized to the sulfate form through Thiobacillus bacteria
changing of atmospheric nitrogen (N2) to nitrogen compounds

ANSWER DOWNLOAD EXAMIANS APP