Download App

Why Do we Fall Ill — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWhy Do we Fall Ill1 Mark
MCQ
Vectors can be defined as:
  • ✓
    Animals carry the infecting agents from sick person to another healthy person.
  • B
    Microorganisms which cause many diseases.
  • C
    Infected person.
  • D
    Diseased plants.
✓

Answer

Correct option: A.
Animals carry the infecting agents from sick person to another healthy person.
Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. Species of mosquito, for example, serve as vectors for the deadly disease Malaria.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from Why Do we Fall Ill→Why Do we Fall Ill — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Scientifically, work is said to be done in which of the following cases:
→
Tincture of iodine has antiseptic properties. This solution is made by dissolving:
→
Higher the frequency of a musical sound$, .......$ is its pitch:
→
Silver nitrate solution is used to study:
→
Which of the following classes has largest number of animals?
→
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as follows. Which symbol is the correct one?
→
Angiospermae is a division of kingdom Plantae. The main characteristic feature of angiosperms is:
→
These are goods taken directly from natural resources.
→
A motorcycle is being driven at a speed of $20\ m/s$ when brakes are applied to bring it to rest five seconds. The deceleration produced in this case will be:
→
Name the gas which plays a major role in global warming:
→