Available Answers

1. 1.

   Tick (√) the correct option.

   1. Which of the following does not show any signs of life outside the living body?
      1. Bacteria
      2. Protozoa
      3. Fungi
      4. Virus
   2. In which of the following microorganism is chlorophyll present?
      1. Bacteria
      2. Algae
      3. Fungi
      4. Virus
   3. The products of fermentation are
      1. starch and carbon dioxide
      2. alcohol and carbon dioxide
      3. starch and water
      4. alcohol and water
   4. The bacteria Lactobacillus is used to make
      1. cheese
      2. jam
      3. pickles
      4. alcohol
   5. Yeast and mould are examples of
      1. Bacteria
      2. Algae
      3. Fungi
      4. protozoa
2. 2.

   Fill in the blanks.

   1. _______________, _______________, _______________, _______________ and _______________ are five major groups of microorganisms.
   2. Cocci is a _______________.
   3. _______________ bacteria help in the formation of curd.
   4. _______________ lives in _______________, where it helps to digest food.
   5. _______________ is also used to make toothpaste.
3. 3.

   Give two examples of each.

   1. Antibiotics
   2. Communicable diseases
   3. Diseases caused by bacteris in human beings
   4. Diseases in animals
   5. Food preservation methods
4. 4.

   Match the columns.

   COLUMN A	COLUMN B
   1. Microbes	a. Vaccination
   2. Virus	b. Fermentation
   3. Yeast	c. Produced in our body
   4. Polio drops	d. Obtained from microbes
   5. Pasteurisation	e. Malaria and dengue
   6. Antibodies	f. Tiny organisms
   7. Antibiotics	g. Measles
   8. Anopheles and Aedes	h. Milk preservation

    

5. 5.

   Microorganisms can be viewed only under a microscope. Give reasons.

6. 6.

   Microbes keep our planet clean. Give reasons.