Which of the following cyanobacteria can fix atmospheric nitrogen?
$I.$ Anabaena
$II.$ Oscillatoria
$III.$ Nostoc
Choose the correct option
$I \, \& \, II$
$II \, \& \, III$
$I \, \& \, III$
$I, II \, \& \, III$
What are biofertilizers ? Give two examples.
Some blue green algae can be used as biofertilizer as they are
An example of endomycorrhiza is
In paddy fields, _______ serves as an important biofertiliser
Identify correct option for micorrhiza
$(1)$ Many members of the genus glomusinvolved micorrhiza
$(2)$ It is responsible for all mineralsabsorption from the soil
$(3)$ Such associations show benefitsagainst draught and salinity in plants
$(4)$ Micorrhiza is a symbiotic relation ofalgae and plants