Waec Biology Past Questions and Answers

Question 91:

• WAEC 1990

Gaseous exchange takes place in the adult toad through the

A. Buccal cavity, bladder and lungs
B. Buccal cavity, skin and lungs
C. Tympanic membrane, lungs and gills
D. Buccal cavity, skin and spiracle
E. Gills skin and buccal cavity

Question 92:

• WAEC 1990

Breathing movement in mammals is accompanied by regular movements of the diaphragm and the

A. Intercostal muscles
B. Vertebral column
C. Clavicle
D. Pleural cavity
E. Floating ribs

Question 93:

• WAEC 1990

Which of the following are components of glomerular filtrate?

A. All the components of Blood except mineral salts
B. Water and salt only
C. All the components of blood except plasma protein and cells
D. Plasma proteins, red and white blood cells
E. Blood cells, amino acid, salts and nitrogenous wastes.

Question 94:

• WAEC 1990

The mechanism by which useful materials in the glomerular filtrate are taken back into the blood is known
as

A. Filtration
B. Reabsorption
C. Haemolysis
D. Osmosis
E. Dialysis

Question 95:

• WAEC 1990

Which of the following takes place during the process of detoxication in the liver?

A. Poisonous substances in the body are converted into harmless substances
B. Fats and oils are broken into finer particles through emulsification
C. Excess glucose in the blood are converted into glycogen and stored
D. Worn- out red blood cells are broken down
E. Enough heat is generated to sustain the activities of the liver