1991 - WAEC Biology Past Questions & Answers - page 1

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
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
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
4
The mechanism of gaseous exchange in living organisms is essentially by
A
osmosis
B
inhalation
C
diffusion
D
exhalation
CORRECT OPTION: c
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
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
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
8
Muscles are attached to bones by means of
A
ligament
B
cartilage
C
synovial membrane
D
tendons
CORRECT OPTION: d
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
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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