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• Form blooms in polluted water bodies, • Heterocysts- Nostoc and Anabaena can fix atmospheric nitrogen in, specialised cells called heterocysts, Chemosynthetic bacteria - Oxidise various inorganic substances, such as nitrites, nitrates and ammonia and use the released energy, for ATP production., They recycle nutrients like nitrogen, phophorous,iron and sulphur., Heterocyst, Mucilagenous, sheath, Heterotrophic bacteria, Most abundant in nature., Majority are decomposers., USES, v Making curd from milk., v Production of antibiotic., v Fixing nitrogen in legume roots., Bacterial diseases, Cholera ,Typhoid ,Tetanus ,Citrus canker, Мусoplasma, • Lack cell wall., Smallest living cells known., Survive without oxygen., W Edit with WPS Office

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Pathogens., W Edit with WPS Office