Agents like mosquitoes and rat fleas that carry disease-causing organisms are called _________.

pathogens

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microorganisms

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vectors

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none of these

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Solution

The correct option is C
vectors

Organisms like mosquitoes and rat fleas that carry pathogens or disease causing organisms are called vectors. Vectors carry diseases from one infected person to a healthy person.
For example, female Anopheles mosquitoes carry a protozoan Plasmodium which causes malaria and rat fleas carry a bacterium Yersinia pestis which causes bubonic plague.

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Similar questions

(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?

(b) Mention any three ways of preventing diseases spread by mosquitoes.

Fill in the blanks

(a) Many skin diseases are caused by___.
(b) Living organisms carrying the infecting agents from one person to another are called ____.

Q. State whether the following statements are true or false-
Statement 1- Pathogens that spread through air are called fomite borne diseases.
Statement 2- Vectors like mosquitoes carry pathogens and infect people, causing Waterborne disease.

Organisms that carry disease causing organisms and infect other organisms without being infected themselves are called .

__ 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.

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