myclass24your class. your pace.

ScienceCLASS 9CBSE

answered 27 Mar 2026

Vectors can be defined as (a) animals carry the infecting agents from sick person to another healthy person (b) microorganisms which cause many diseases (c) infected person diseased plants

A.VERIFIED ANSWERfact-checked by tutors

Soln:

Answer is (a) animals carry the infecting agents from sick person to another healthy person.

Suggested Q&A

SCIENCE · CLASS 9

ScienceCLASS 9
1. Why does the temperature of a substance remain constant during its melting point or boiling point?
ScienceCLASS 9
Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. Sponge though compressible is a solid.
ScienceCLASS 9
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
ScienceCLASS 9
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
ScienceCLASS 9
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment
ScienceCLASS 9
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.