Waec Biology 2011 Past Questions and Answers

Question 41:

• WAEC 2011

A xerophyte conserves water by possession of the following features except

A. Thick cuticle
B. Sunken stomata
C. Broad leaves
D. Fleshy stem

Question 42:

• WAEC 2011

The falling off of leaves of deciduous trees is helpful to the plant because it

A. Reduces the rate of transpiration
B. Enables the plant to conveniently eliminate its excretory products
C. Enables the plant to bear more fruits
D. Ensures that the limited mineral salts get to only growing regions

Question 43:

• WAEC 2011

A sample of wet garden soil of known weigh was heated to constant weight. The loss of weight is due to loss of

A. Water
B. Organic matter
C. Water and organic matter
D. Water and inorganic matter

Question 44:

• WAEC 2011

Assuming that a period of stable population size is followed by a period when natality increases by ten (1O) per cent and immigration increases by twenty (20) percent of population size. The population size will

A. Be at equilibrium
B. Increase by forty (40) per cent
C. Begin to increase
D. Begin to decrease

Question 45:

• WAEC 2011

Which of the following methods does not make water fit for drinking?

A. Addition of chlorine
B. Boiling
C. Distillation
D. Addition of alum