F.
1. What is food preservation? Describe
any four methods of food preservation.
2. Give mode of transmission and
preventive measures of any four
communicable diseases.
3. Explain nitrogen cycle with the help of
a diagram.
4. Describe some uses of microorganisms.
Answers
Answer:
1.The term food preservation refers to any one of a number of techniques used to prevent food from spoiling. It includes methods such as canning, pickling, drying and freeze-drying, irradiation, pasteurization, smoking, and the addition of chemical additives
2.Ebola.
Enterovirus D68.
Flu.
Hantavirus.
Mentioned above are all communicable diseases.
---Handle & Prepare Food Safely. ...
Wash Hands Often. ...
Clean & Disinfect Commonly Used Surfaces. ...
Cough & Sneeze Into Your Sleeve. ...
Don't Share Personal Items. ...
Get Vaccinated. ...
Avoid Touching Wild Animals.
Explanation:
1)Food preservation, any of a number of methods by which food is kept from spoilage after harvest or slaughter. Such practices date to prehistoric times. Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation,.
2)Communicable diseases can be classified in different ways into groups with similar characteristics. Classification will help you to select and apply appropriate prevention and control measures that are common to a class of communicable diseases. In this section you will learn the basis for each way of classifying communicable diseases and its relevance to your practice. This will be clarified using examples of communicable diseases that you may already be familiar with.
3)The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.
4)Microorganisms and its Uses. The term 'microorganisms' include bacteria, fungi, viruses and protozoa. ... But, it is a fact that microorganisms are useful to us in many ways. Microorganisms help in the production of many food items, making medicines, keeping the environment clean, in manufacturing and in research.