CBSE (Central Board of Secondary Education) Class-8 Science: Questions 1 of 465
Question MCQ▾
Micro-organisms which causing diseases in human beings are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Algae | |
b. | Virus | |
c. | Bacteria, Protozoa | |
d. | Both b. and c. are correct |
Answer
d.
Explanation
Bacteria, Virus and protozoa causes different type of diseases in human beings such as cholera, diphtheria, typhoid are bacterial diseases. Virus causes measles, polio, chicken pox etc. Protozoa disease is malaria. Algae grow profusely in water reservoirs meant for drinking purpose. As a result drinking water gets bad taste, odour and colour.