CBSE (Central Board of Secondary Education- Board Exam) Class-8 Science: Questions 1 of 469

» Microorganisms: Friend and Foe » Harmful Microorganisms » Disease Causing Microorganisms in Humans

MCQ▾

Question

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.
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