Q29 of 39 Page 76

Name any three diseases transmitted through vectors.

Malaria, Dengue and Kala Azar

Vector-borne diseases are illnesses that are transmitted by vectors, which include mosquitoes, ticks, and fleas. These vectors can carry infective pathogens such as viruses, bacteria, and protozoa, which can be transferred from one host (carrier) to another.


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27

Classify the following diseases as infectious or noninfectious.

 28

Name any two groups of microorganisms from which antibiotics could be extracted.

 30

Explain giving reasons

(a) Balanced diet is necessary for maintaining healthy body.


(b) Health of an organism depends upon the surrounding environmental conditions.


(c) Our surrounding area should be free of stagnant water.


(d) Social harmony and good economic conditions are necessary for good health.

 31

What is a disease? How many types of diseases have you studied? Give examples.