Main function of bio-fertilizer is
2021
Main function of bio-fertilizer is
- A.
to increase chemical process
- B.
to increase physiological process
- C.
to increase biological process
- D.
to increase photosynthesis process
Show answer & explanation
Correct answer: C
Concept: A bio-fertilizer is a substance that contains living micro-organisms (such as bacteria, blue-green algae, fungi) which, when added to soil, seeds or roots, become active and enrich the soil. They improve plant nutrition through the biological activity of these microbes — for example by fixing atmospheric nitrogen, solubilising phosphate, or producing growth-promoting substances.
Applying this here: because the working substance is living microbes carrying out life processes in the soil, the main function of a bio-fertilizer is to increase the biological process (microbial activity) in the soil, which in turn makes nutrients available to the plant. So the correct choice is 'to increase biological process'.
Why the other choices do not fit:
Increasing a chemical process describes chemical fertilizers, which supply nutrients through chemical reactions rather than through living organisms.
Increasing a physiological process refers to the plant's own internal life functions, not the action of soil micro-organisms that a bio-fertilizer provides.
Increasing photosynthesis is a leaf process driven by light and chlorophyll; bio-fertilizers act in the soil through microbes, not directly on photosynthesis.