Biology 1990 Waec Past Questions and Answers

Question 6 :

• WAEC 1990

Which of the following structures differentiates an animal cell from a plant cell?

A. Ribosomes
B. Cell membrane
C. Chloroplast
D. Mitochondrion
E. Lysosome

Question 7 :

• WAEC 1990

At the end of mitosis the number of cells produced from a parent cell is

A. Four
B. Six
C. Eight
D. Three
E. Two

Question 8 :

• WAEC 1990

Which of the following statements is not correct of respiration?

A. Gaseous exchange occurs by diffusion
B. Oxygen combines with haemoglobin at the respiratory surface
C. Carbondioxide produced in the tissues is removed by the process of osmosis
D. There are no special organs for respiration in plants
E. In higher animals, respiratory gases are transported in solution.

Question 9 :

• WAEC 1990

At which of the following stages of mitosis do the two daughter chromosomes separate completely?

A. Early prophase
B. Telophase
C. Anaphase
D. Late prophase
E. Metaphase

Question 10 :

• WAEC 1990

Which of the following processes is not evident from the drawing?

A. Lining up of the chromosomes at the equatorial plate
B. Centromere attaching a pair of chromatids to a spindle fibre
C. Chromatids held by centromere
D. Absence of nuclear membrane
E. Chromatids moving to the poles