Biology 1989 Waec Past Questions and Answers

Question 71 :

• WAEC 1989

(a) Describe an experiment to demonstrate the influence of auxins on the growth of plant shoot.
(b) List three uses of auxins in agriculture.
(c) Describe briefly the mechanism of transmission of impulses through a nerve fibre.

Question 72 :

• WAEC 1989

(a) Describe how the floral parts of a named flower are adapted to wind-pollination.
(b) Explain how each of the following behaviours in animals affects the reproduction process: (i) territoriality. (ii) display; (iii) seasonal migration.