Waec Biology 1990 Past Questions and Answers

Question 41:

• WAEC 1990

Which of the following reagents is used for the test for starch?

A. Million’s reagent
B. Fehling’s’ solution
C. Sudan III
D. Iodine solution
E. Benedict’s solution

Question 42:

• WAEC 1990

Which of the following is an autotrophic mode of nutrition?

A. Chemosynthesis
B. Saprophytism
C. Parasitism
D. Symbiosis
E. Commensalism

Question 43:

• WAEC 1990

Which of the following is not a way of reducing air pollution?

A. Siting factories and power stations away from residential areas
B. Building tall factory chimneys
C. Passing waste gases through filters and absorbers
D. Using lead-free petrol in cars
E. Recycling tins, cans and bottles

Question 44:

• WAEC 1990

Which of the following factors is not associated with aquatic habitat?

A. Temperature
B. Light intensity
C. Turbidity
D. Wave action
E. Humidity.

Question 45:

• WAEC 1990

Which of the following types of soil has the highest water-retaining capacity?

A. Clay
B. Laterite
C. Loam
D. Gravel
E. Sand