Rhizobium contain leghaemoglobin it work similar to…………….
a) nitrogen
b) haemoglobin
c) protein
d) none of these
Ammonification process is carried out by
a) symbiotic bacteria
b) decomposers
c) fungi
d) none of these
Water:
The substance that cover three fourth of the earth surface.
a) carbon
b) water
c) ammonia
d) sulphur
The salt water present on earth is…………….
a) 50%
b) 70%
c) 97%
d) 10%
The percentage of fresh water is………………
a) 2%
b) 4%
c) 3%
d) 10%
