(i) The shift from grain to meat diets creates more demands for cereals. Why?
(ii) A 250 kg cow produces 200 g of protein per day but 250 g of Methylophilus methylotrophus can produce 25 tonnes of protein name this emerging area of research. Explain its benefits.
(i) The shift from grains to meat diets, creates more demand for cereals as it takes 3-10 kg of grain to produce 1 kg of meat by animal farming.
(ii) This research is related to single cell protein. Microbes . are being grown-on an industrial scale as a good source of protein.
Microbes like Spirulina can be grown easily on materials like waste water from potato processing plants (containing starch), straw, molasses, animal manure and even sewage, to produce large quantities and can serve as food rich in protein, minerals, fats, carbohydrate and vitamins. Such utilisation also reduces the environmental pollution.