Which microorganism causes AIDS?
  • A protozoa
  • A bacteria
  • A virus
  • An algae
Which of the following disease is spread due to bacteria?
  • Tuberculosis
  • Measles
  • Chicken pox
  • Polio
Which of the following is not used as food preservatives?
  • Salt
  • Sugar
  • Vinegar
  • Methane
The process by which amount of nitrogen remains the same in the atmosphere is known as
  • fermentation
  • carbon cycle
  • nitrogen cycle
  • photosynthesis
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0