question_answer 31)

  We should not allow mosquitoes to breed in our surroundings because they (a) multiply very fast and cause pollution              (b) are vectors for many diseases (c) bite and cause skin diseases                                                 (d) are not important insects

Answer:

  (b) Many animals which live with us carry disease. These animals transfers infecting agents from sick person to another potential host (healthy person) and act as vectors. Mosquitoes are known to cause many diseases.

Anopheles	Malaria
Culex	Filariasis
Aedes	Yellow fever, dengue, filarial sis