Q24 of 44 Page 32

Name the stages of Plasmodium.

i) introduced by an infected Anopheles mosquito.


ii) picked up by Anopheles mosquito from an infected human being.


i) Sporozoite stage: When female anopheles mosquitoes bite a healthy person, the sporozoites (the infectious stage) are introduced into the human body.


Gametocytic stage: when female anopheles bites infected person and sucks blood along with gametocytes.


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22

Find the correct statement (True / False):

i) Tuberculosis is caused by Mycobacterium tuberculosis bacteria.


ii) Typhoid is caused by Trichophyton fungi.


iii) Malaria is caused by Plasmodium vivax.


iv) Influenza is caused by Entamoeba histolytica protozoan.


 23

Malarial fever is not caused in a person immediately after introducing the sporozoites by an infected anopheles mosquito. Why?

 25

Name two diseases that are transmitted by houseflies. Mention their causative pathogens.

 26

Observe the following flow-chart


Mention the metabolic disorder ‘X’ and the causative factor from the options given below: