The swarming especially at the beginning of the rainy season is a courtship behaviour shown by?
(a) (i) List two diseases each of plants and animals caused by bacteria.
(ii) State three ways in which bacteria are useful.
(b) State three methods by which mosquitoes can be controlled and state the reason for each method
(c) Describe an experiment to demostrate the presence of bacteria under the finger nails
(a) Describe the process of inhalation in man .
(b) Describe briefly the process of gaseous exchange in the shoo: system of flowering plants.
(c) Describe an experiment to demonstrate the effect of distilled water on mammalian red blood cell.
