Class VIII

Which of the following is a viral disease? 
  1. Polio
  2. Tuberculosis 
  3. Typhoid
  4. All of these
Bacteria and blue green algae are able to fix nitrogen from the atmosphere to enrich soil, with nitrogen increase  its fertility.These microbes which are responsible for it are called ?
  1. Viruses
  2. Soil
  3. Biological nitrogen fixers.
  4. None of these
Amoeba belongs to
  1. algae
  2. fungi
  3. protozoa
  4. virus
Scientist who discovered fermentation is
  1. Alexander Fleming
  2. Louis Pasteur
  3. John Mendal
  4. Edward Jenner
Which of the following is a protozoan?
  1. Aspergillus
  2. Penicillium
  3. Parameocium
  4. Chlamydomonas
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