Which of the following can be considered as a direct evidence of evolution?

(a) Explain the terms:
(i) Parasitism
(ii) Commensalism

(b) Mention:
(i) one fungal parasite of a plant and its host
(ii) one bacterial parasite of humans.

(c)(i) List four symptoms of malaria.
(II) Mention six methods of controlling malaria in West Africa 
 

(a) What is a receptor?

(b) Describe the general features common to all receptors.

(c)(i) Make a labelled diagram 8cm - 10cm long, to show the outer and middle ear only of human.
(ii) List three ways of caring for the ear.

(a) List the main constituents of mammalian blood.

(b) State two functions of each constituent.

(c) Tabulate six differences between arteries and veins.

(d) Name the main artery which transports blood to the:
(i) Lung
(ii) Kidney.