Which one is a spindle-shaped,mobile organism containing microtubules?

Kala-azar and Oriental sore are transmitted by ............ .

Which of the following diseases are transmitted by mosquitoes?
$(i)$ Malaria $(ii)$ Pneumonia $(iii)$ Filariasis $(iv)$ Hepatitis

In malaria,which substance is responsible for the chills and high fever that recur every three to four days?

If the presence of mucus and blood clots is observed in the stool,it is an indication of which of the following?

$S$ - Statement: The $Anopheles$ mosquito is responsible for malaria.
$R$ - Reason: $Plasmodium$ uses both humans and the female $Anopheles$ mosquito as hosts.