Waec Biology Past Questions and Answers

Question 141:

• WAEC 1991

The mechanism of gaseous exchange in living organisms is essentially by

A. Osmosis
B. Inhalation
C. Diffusion
D. Exhalation
E. Breathing

Question 142:

• WAEC 1991

Which of the following statement is correct about diffusion?

A. It involves movement of water molecules only
B. Molecules move from a region of higher concentration to a region of lower concentration
C. Differentially permeable membrane must be present for diffusion to occur
D. It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
E. It occurs when a solute can no longer dissolve in a solvent

Question 143:

• WAEC 1991

The process of anearobic respiration of yeast in sugar solution is known as

A. Oxidation
B. Fermentation
C. Tissue respiration
D. Alcohol production
E. Decomposition

Question 144:

• WAEC 1991

The following are functions of the skeleton except

A. Providing support for the body
B. Protection of delicate internal organs
C. Maintenance of the shape of the body
D. Providing attachment for muscles
E. Controlling growth rate in animals

Question 145:

• WAEC 1991

Muscles are attached to bones by means of

A. Ligament
B. Cartilage
C. Synovial membrane
D. Tendons
E. Connective tissue