Waec Biology Past Questions and Answers

Question 121:

• WAEC 1990

Water in the human body is derived from the following sources except through

A. Drinking water
B. Food substances
C. Cytoplasm of worn-out cells
D. Respiratory activity
E. Absorption by the skin

Question 122:

• WAEC 1990

The conservation of natural resources can be achieved by the following except

A. Creation of national parks
B. Formation of conservation societies and agencies
C. Establishment of game reserves
D. Deregulated harvesting
E. Making laws on conservation

Question 123:

• WAEC 1990

Water rises most rapidly in

A. Sandy soil
B. Clayey soil
C. Sandy-loam soil
D. Loamy soil
E. Humus soil

Question 124:

• WAEC 1990

Thrombocytes are blood cells responsible for initiating

A. Phagocytosis of bacteria
B. Synthesis of ribosomes
C. Clotting of the blood
D. Immunity to certain infectious diseases
E. Removal of carbondioxide from tissues.

Question 125:

• WAEC 1990

When gametes from pure breeding parents with contrasting features such as tallness and shortness are
involved in monohybrid cross, the offspring in the first filial generation are usually

A. Pure breed
B. Heterozygous dominant
C. Homozygous recessive
D. Mutants
E. Co-dominant