Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Non symbiotic and symbiotic microorganisms only
None of these
Non symbiotic microorganisms only
Symbiotic microorganisms only

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
A heterocyst is

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

ANSWER DOWNLOAD EXAMIANS APP

Microbiology of Soils
Nitrogen fixation

both (a) and (b)
changes the free nitrogen (N2) to a form usable by plants
fix the free nitrogen (N2) by which it should not be usable by plants
especially changes nitrogen compounds, mostly amines such as NH2

ANSWER DOWNLOAD EXAMIANS APP