(i) Name causative agent of malaria. Which insect vector spreads it? (ii) Which step the biologists immediately took to check the disease ? (iii) Name the most common antimalarial drug being used. From where is it extracted?

Recently. Some newspapers carry news about increased incidences of malaria in nearby villages of out city. The Chief Medical Office of the district asked the scientists (zoologist) and their team to conduct through survey of the area and suggest neccessary steps. The survery revealed that public services were in very poor shape. As a result lot of garbage and dirty water had accumulated at places which provide ideal sites of breeding of mosquitoes and disease carrying agents (such as house flies, cockroaches, etc.). Recall what you have studied about human diseases in the class and answer following questions: (i) Name causative agent of malaria which insect vector spread it. (ii) Which step the zoologist immediately look to check the disease? (iii) Name the most common antimalarial drug being used. From where it is obtained?

Name the causative agent of malaria, Give the name of its vector and symptoms. Name two drugs which control the disease.

Name the plant and its part which is used to extract important antimalarial drug. Name the drug also.

Name the causative organism of typhoid disease. Name the common vector which spreads the pathogens of typhoid from the faeces to the food and water.

(a) Name any two useful insects and the products which are of use to man. (b) List three species of mosquitoes and the disease they spread.

(i) Which roundworm is responsible for causing elephantiasts or filariasis disease ? (ii) What si the habitat of this roundworm inside its host ? (iii) Name atleast two other round worms which cause diseases in human beings.

(i) Name the most common ore of the metal aluminum from which the metal is extracted. Write the chemical formula of the ore. (ii) Name the process by which impure ore of aluminum gets purified by using concentrated solution of an alkali. (iii) Write the equation for the formation of aluminum at the cathode during the electrolysis of alumina.