________ carry the disease-causing organisms.
(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?
(b) Mention any three ways of preventing diseases spread by mosquitoes.
__ are the organisms that help in the spread of a disease from an infected person to a healthy person by carrying the disease-causing pathogens.
Organisms that carry disease causing organisms and infect other organisms without being infected themselves are called .
Agents like mosquitoes and rat fleas that carry disease-causing organisms are called _________.