Question

Which of the following microorganisms play an important role in maintaining the balance
of nitrogen gas in the atmosphere?
(A) Viruses
(B) Bacteria
(C) Algae
(D) Protozoa
Which of the following can affectively prevent the ringworm disease
(A) Vaccination
(B) Vector control
(C) Improving personal hygiene
(D) Using antibiotics
Which of the following microorganisms causes common cold?
(A)bacteria
(B)virus
(C)protozoa
(D)algae​

Answer 1

1) (B) Bacteria
2)(A) Vaccination
3) (B) Virus