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LAKHMIR SINGH & MANJIT KAUR-MICRO - ORGANISMS : FRIEND AND FOE.-EXERCISE
- State the causative micro - organisms and modes of transmission of the...
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- What is meant by communicable diseases ? Name any two communicable dis...
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- What are the the various ways in which communicable diseases can occur...
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- Name any five human diseases caused by micro - organisms. Also name th...
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- State the various ways of preventing the occurrence and spreading of c...
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- What is a vaccine ? How does a vaccine work ?
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- Why are children given vaccination ?
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- What is meant by 'nitrogen fixation' ? State two ways in which nitroge...
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- Draw a neat ,labelled diagram of nitrogen cycle in nature. Which natur...
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- The bread dough rises because of :
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- Yeast is used in the production of :
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- The process of conversion of sugar into alcohol is called .
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- Which of the following is an antibiotic ?
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- Tick the correct answer: The most common carrier of communicable dis...
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- The carrier of malaria - causing protozoan is :
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- The vaccine for smallpox was discovered by:
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- Alcohol can be converted into vinegar by the action of micro - organis...
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- The first antibiotic called penicillin was extracted from:
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- Which of the following is not a commounicable disease ?
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- Which of the following increase the fertillity of soil ? A) Lactobac...
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