1989 - WAEC Biology Past Questions and Answers - page 1
1
Which of the following structures is responsible for osmoregulation?
A
I
B
II
C
III
D
IV
2
Excretion is carried out through the structure labelled
A
I
B
III
C
IV
D
V
3
The part labelled VII is made up of
A
carbohydrates
B
lipid materials
C
waste materials
D
protein materials
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
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
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?
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
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
7
The cell membrane consists of
A
carbohydrates and lipids
B
vitamins and proteins
C
lipids and proteins
D
water and sugar
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
9
Which of the following constitutes the main internal tissue of a leaf?
A
Cuticle
B
Mesophyll
C
Vascular tissue
D
Lower epidermis
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?
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
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