1989 - WAEC Biology Past Questions & Answers - page 1

1
Which of the following structures is responsible for osmoregulation?
A
I
B
II
C
III
D
IV
CORRECT OPTION: b
2
Excretion is carried out through the structure labelled
A
I
B
III
C
IV
D
V
CORRECT OPTION: d
3
The part labelled VII is made up of
A
carbohydrates
B
lipid materials
C
waste materials
D
protein materials
CORRECT OPTION: b
4
Below is a List of the levels of organization in organisms.
i. Tissue ii. System ii. Cell iV. organ The correct sequence of the levels in an increasing order of complexity is
A
I,II,III
B
lll, I, l\/, ll
C
lll, IV, l, ll
D
lV, lll, I, ll
CORRECT OPTION: b
5
Below is a List of the levels of organization in organisms.
i. Tissue ii. System ii. Cell iV. organ Which of the following organelles is used for locomotion in Paramecium?
A
pseudopodium
B
Trchocyst
C
Cilium
D
pellicle
CORRECT OPTION: c
6

Which of the following is not true of the nucleus of a living cell? It contains

A
chromosome
B
Nucleolus
C
nucleoplasm
D
chromatids
CORRECT OPTION: e

From the above diagram, we see that the components of the nucleus excludes ribosomes.

7
The cell membrane consists of
A
carbohydrates and lipids
B
vitamins and proteins
C
lipids and proteins
D
water and sugar
CORRECT OPTION: c
8
Which of the following is not likely to be found in the cell of a ripe tomato fruit?
A
plastids
B
Chlorophyll
C
Cellulose cell wall
D
Mitochondrion
CORRECT OPTION: b
9
Which of the following constitutes the main internal tissue of a leaf?
A
Cuticle
B
Mesophyll
C
Vascular tissue
D
Lower epidermis
CORRECT OPTION: b
10
Four cells with osmotic potential equivalent to that of 3% salt solution were immersed respectively in solutions
of different concentrations labeled as follows: I = 4% salt solution; II = 6% salt solution III = 1% salt solution;
IV = 10% salt solution; V = 5% salt solution. Which of the solutions will cause an increase in osmotic
pressure within the cell?
A
I
B
II
C
III
D
IV
CORRECT OPTION: c
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