ORS stands for oral Rehydration Solution. Oral rehydration solutions (ORS) are used to treat dehydration caused by diarrhea. 

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Acellular organisms are those that are not composed of cells. They are different from other cellular organisms as they cannot divide, and they lack the ability to synthesize proteins. For example: virus.

Correct Answer: Lactobacillus

Tuberculosis is a bacterial infection that primarily attacks the lungs but can spread to other parts of the body.

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Fermentation is the process of converting carbohydrates to alcohol or organic acids using microorganisms—yeasts or bacteria—under anaerobic conditions.

Names of diseases caused by protozoa include malaria, diarrhea, dysentery and colitis.