NCERT Important Questions Class 8 Science chapter 2 with Answer solution with pdf. Here We Provides Class 1 to 12 all Subjects NCERT Solution with Notes, Question Answer, CBSE and HBSE Important Questions, MCQ and old Question Papers for Students.
- Also Read :- Class 8 Science NCERT Solution
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CBSE and HBSE Solution of Class 8 Science chapter 2 Microorganism friend and foe important Questions And Answer solution.
Class 8 Science Chapter 2 Important Questions and Answer
Q.1 What are the Major groups of classification of microorganisms?
Ans – There are four major groups. These are Bacteria, fungi, protozoa, and algae.
Q.2 What are antibiotics?
Ans – Such kind of medicines that can kill or stop the growth of microorganisms are called antibiotics.
Q.3 What are antibodies?
Ans – When a disease-carrying microbe enters in our body then the body protects us from such diseases with making antibodies.
Q.4 What are Communicable diseases?
Ans – Microbial disease that can spread through food, water or any physical contact are called communicable diseases. Example- Common cold, chicken pox
Q.5 Name some diseases caused by the virus.
Ans – Measles, Chicken pox, polio, Hepatitis A.
Q.6 Name Some Diseases caused by Bacteria.
Ans – Tuberculosis, cholera, typhoid.
Q.7 Name some Chemical methods of Preserving food.
Ans – There are following ways to preserve food.
- Preservation by common salt
- Preservation by sugar
- Preservation by oil and Vinegar
- preservation by heat and cold process
Q.8 What is Pasteurisation? ( Most Important )
Ans – The Method of preserving food from microorganisms where food is heated and then cooled down suddenly is called pasteurisation.
Q.9 Write some Benefits of Yeast.
Ans – Yeast plays an important role in our day to day life. Here are some uses / Benefits of Yeast.
- Convert milk into curd
- Making of alcohol
- Used in the making of Bread, Pastries, and Cakes
Q.10 What is Fermentation?
Ans – The Process of Conversion of sugar into alcohol is called fermentation.