1989 WAEC Biology past questions and answers

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1
Which of the following structures is responsible for osmoregulation?

A I

B II

C III

D IV



Correct Option: B


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2
Excretion is carried out through the structure labelled

A I

B III

C IV

D V



Correct Option: D


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3
The part labelled VII is made up of

A carbohydrates

B lipid materials

C waste materials

D protein materials



Correct Option: B


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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


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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


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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


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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


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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


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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


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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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