(a) Describe the roles of: (i) Microbes in biogas production
(ii) mycorrhiza as biofertillzer.
(b) Name the fungus that produces cyclosporin A.

Explanation

(a) Describe the rotes of (i) Microbes in biogas production (ii) Mycorrhiza as biofertilizer (b) Name the fungus that produces cyclosporine A
The roles of :
(i) Microbes in biogas production: Certain bacteria, which grow anaerobically on cellulosic material, produce large amount of methane along with `CO_(2)` and `H_(2)`
These bacteria are called methanogens. An example for methanogen is Methamobacterium. The excreta or the dung of cattle is rich in these bacteria. The dung can be used for generation of biogas. During the biogas production, slurry of cow dung is used in a biogas plant where methane is produced bt these bacteria.
(ii) Mycorrhiza as biofertilizer : Some fungi are also known to form symbiotic associations with plants. They are called mycorrhiza. Many members of the genus Glomus form mycorahiza. The fungal symbiont in these associations absorbs phosphorus from the soil and passes it to the plant. Plants having such associations show other benefits also, such as resistance to root - borne pathogens, tolerance to salinity and drought, and an overall increase in plant growth and development. (iii) The fungus that producess cyclosporin A is Trichoderma polysporum.