NEETBiotechnology: Principle and ProcessHard
Question
A biofertilizer is
Options
A.a cyanobacterium like Anabaena sp. Living in cavitiets of Azolla leaves
B.symbiotic bacteria like Anabaena which fix atmospheric nitrogen
C.farm yard manure consisting of mixture of cattle dung and crop
D.green manure in which a quickly growing crop is cultivated and ploughes under
Solution
Biofertilizer are those organisms which can bring about enrichment of soil. The leaves of Azolla house Anabaena colonies which fix atmospheric nitrogen. Azotobacter is also a biofertilizer but it is free-living (non-symbiotic).
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