‘Malaria' a common disease world wide is caused by a
Bacterium
Virion
Protozoa
Helminths
Entamoeba histolytica feeds on
The poisonous substance released as a result of ruputring of schizont in $ R.B.Cs. $ of malarial patient is
The carnivorous fish Gambusia, introduced in the lakes, ponds, etc., control a deadly disease in India, feeds on the larvae of