Waec Biology 1991 Past Questions and Answers

Question 1:

• WAEC 1991

The cell is a functional unit of living organisms because

A. Multicellular organisms are made up of cells
B. All cells in a multicellular organism function as a single cell
C. The function of a multicellular organism is the sum total of the functions of its constituent cells
D. The function of a single cell is superior to that of the multicellular organism
E. The cells of a multicelullar organism are similar in structure

Question 2:

• WAEC 1991

The cell is a functional unit of living organisms because

A. Multicellular organisms are made up of cells
B. All cells in a multicellular organism function as a single cell
C. The function of a multicellular organism is the sum total of the functions of its constituent cells
D. The function of a single cell is superior to that of the multicellular organism
E. The cells of a multicelullar organism are similar in structure

Question 3:

• WAEC 1991

The organelle which eliminate water from the body of protozoa is

A. Plasma membrane
B. Contractile vacuole
C. Cell wall
D. Protoplasm
E. Nucleus

Question 4:

• WAEC 1991

Spirogyra is regarded as a multicellular plant because

A. Its cells are linked together by cytoplasmic strands
B. Its cells are joined to form organs
C. The cylindrical cells are linked end to end
D. The filaments consist of one cell only
E. It is an algea containing large vacuoles

Question 5:

• WAEC 1991

The mechanism of gaseous exchange in living organisms is essentially by

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