NEET Biology Microbes in Human Welfare
Microbes In Human Welfare PDF Notes, Important Questions and Synopsis
- Microbes in Household Products
Lactic acid bacteria (LAB)
- Curd from milk
- Fermentation of idli and dosa dough
- Production of Swiss cheese
- Microbes in Industrial Products:
Antibiotic is a chemical substance which is obtained as a metabolic product from one living organism and has an inhibitory effect on another living organism.
Masses of bacteria associated with fungal filaments to form mesh-like structures are called flocs.
Sewage is the municipal waste water containing large amounts of organic matter and microbes.
Difference between Primary Treatment and Secondary Treatment of Sewage
Biochemical oxygen demand (BOD) refers to the amount of oxygen which would be consumed if all the organic matter in one litre of water was oxidised by bacteria.
Biogas is a mixture of gases produced during the decay of biomass in the absence of oxygen.
Bacteria which grow anaerobically on cellulosic material and produce a large amount of methane along with CO2 and H2 are collectively called methanogens.
Biological control is the control of destructive insects with the utilisation of other insects.
The soil bacterium Bacillus thuringiensis acts as a biopesticide.
Integrated pest management (IPM) aims at the minimum use of pesticides to prevent agrochemical pollution and to adopt natural methods of pest control.
Biofertilisers are organisms which can bring about soil nutrient enrichment.
Mycorrhiza is the symbiotic association of fungal hyphae and the roots of higher plants.
Cyanobacteria are autotrophic microbes which can fix atmospheric nitrogen. Examples: Anabaena, Nostoc, Oscillatoria
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