1991 WAEC Biology past questions and answers

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1
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



Correct Option: A


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2
The organelle which eliminate water from the body of protozoa is

A plasma membrane

B contractile vacuole

C cell wall

D protoplasm



Correct Option: B


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3
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



Correct Option: A


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4
The mechanism of gaseous exchange in living organisms is essentially by

A osmosis

B inhalation

C diffusion

D exhalation



Correct Option: C


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5
Which of the following statement is correct about diffusion?

A it involves movement of water molecules only

B Molecules move from a region of higher concentration to a region of lower concentration

C differentially permeable membrane must be present for diffusion to occur

D It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule



Correct Option: B


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6
The process of anearobic respiration of yeast in sugar solution is known as

A oxidation

B fermentation

C tissue respiration

D alcohol production



Correct Option: B


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7
The following are functions of the skeleton except

A providing support for the body

B protection of delicate internal organs

C maintenance of the shape of the body

D providing attachment for muscles



Correct Option: E


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8
Muscles are attached to bones by means of

A ligament

B cartilage

C synovial membrane

D tendons



Correct Option: D


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9
Which of the following tissues is not found in the stem and root of monocotyledons?

A Xylem

B Cambium

C Pith

D Cortex



Correct Option: B


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10
The pulmonary vein carries

A oxygenated blood from right ventricles to the lungs

B oxygenated blood from lungs to the left auricle

C deoxygenated blood from the lungs

D oxygenated blood from lungs to the right auricle



Correct Option: B


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