Biology 1993 Waec Past Questions and Answers

Question 56 :

• WAEC 1993

The division of labour in social insects is an example of

A. Structural adaptation
B. Physiological adaptation
C. Commensalism
D. Behavioural adaptation
E. Hormonal influence

Question 57 :

• WAEC 1993

The swarming especially at the beginning of the rainy season is a courtship behaviour shown by

A. Migratory birds
B. Pigeons
C. Crickets
D. Winged termites
E. Bees

Question 58 :

• WAEC 1993

Lamarck’s evolution theory could be summarised by the statement that

A. Only the fittest can survive in a challenging environment
B. Species that are unable to adapt become extinct
C. New characteristics do not arise in organisms in time of need
D. The changing environment imposes structural physiological and behavioural changes in organisms
E. In a changing and unstable environment nature rejects the weak

Question 59 :

• WAEC 1993

The property of clay soil that prevents it from supporting thick vegetation is its

A. Possession of chemically weathered granite rocks
B. Inability to retain much water
C. Tendency of becoming waterlogged
D. Porosity and low water retention ability
E. High capillary spaces between the soil particles

Question 60 :

• WAEC 1993

(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