(a) Malaria is caused by the parasite Plasmodium. There are four different species of this parasite which cause malaria. Plasmodium reproduces by multiple fission.
(b) (i) glycogen and starch - carbohydrates
(ii) chlorophyll and haemoglobin - pigments
(iii) gills and lungs - respiratory sructures
(iv) arteries and veins - blood vessels