Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
Which of the following structures are adjusted in focusing the image of a
distant or near object on the retina?
AI and II
BII and III
CIII and VII
DIV and V
EV and VII
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Question 1962
waec1993
The light ray entering the eye goes through the following route
AII, III, I, IV, V
BII, I, VII, III
CII, I, III, IV
DV, VI, III, I
EI, VII, III, IV, V
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Question 1963
waec1993
The parts labelled IV, V and VI respectively are the
Aciliary body, optic nerve and yellow spot
B. blind spot, optic nerve and suspensory ligament
Cvitreous humour, yellow spot and optic nerve
Dblind spot, optic nerve and pupil
Eyellow spot, retina and choroid layer
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Question 1964
waec1993
How would you describe the position of the ovary in relation to the
receptacle?
ASuperior
Blnferior
CSemi-inferior
DGamosepalous
EPolysepalous
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Question 1965
waec1993
The function of the part labelled l is to
Areceive pollen grains
Bproduce nectar
Cstore the pollen grains
Dstore the ovules
Eproduce the male gametes
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Question 1966
waec1993
What is the function of the part labelled ll?
AAttraction of insects
BSecretion of nectar
CProtection of the stigma
DFormation of fruit wall
EAttachment of flower to the shoot.
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Question 1967
waec1993
The process whereby microorganisms can convert atmospheric nitrogen into nitrogenous compound is
known as
Anitrogen cycle
Bnitrogen fixation
Cdenitrification
Dputrefaction
Edecomposition
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Question 1968
waec1993
Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?
AEuglena
BProtozoan
CDenitrifying bacterium
DParasitic mould
ENitrifying bacterium
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Question 1969
waec1993
Which of the following mineral salts is a trace element?
AZinc
BCArbon
CHydrogen
DPotassium
ECalcium
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Question 1970
waec1993
Which of the following is not a courtship behaviour exhibited of animals?
APairing
BDisplay
CSeasonal migration
DHibernation
ETerritorialism.
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Question 1971
waec1993
This defect can be corrected by the use of
Aconvex lens
Bconcave lens
Ccylindrical lens
Dsurgical operation
Ebiconcave lens
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Question 1972
waec1993
Which type of eye defect IS illustrated in the diagram above?
AHypermetropia
Bmyopia
CCataract
DAstigmatism
EGlaucoma
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Question 1973
waec1993
The groups of sensory cells found on the upper surface of the tongue are called
Aampullae
Btaste bud
Cnerve cells
Dsomatic cells
Etactile cells
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Question 1974
waec1993
When an axon is at rest, the concentration of ions on either side of the membrane are different. Which of the following is correct about the concentrations ions on either side of the membrane?
AThere is an excess of potassium ions inside the axon and an excess of sodium ions outside
BThe inside of the axon becomes positively charged while the outside is negatively charged
CThere is an excess of sodium ions on the inner side of the axon
DChloride and potassium ions begin to move across the membrane
ECalcium ions accumulate on the inner side of the axon
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Question 1975
waec1993
Ultrafiltration in the kidney takes place in the
Aloop of Henle
Brenal vein
CBowman’s capsule
Dpelvis
Epyramid
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Question 1976
waec1993
Which of the following organs is associated with deamination of proteins?
ALung
BStomach
CKidney
DLiver
EHeart
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Question 1977
waec1993
Which of the following structures functions as an excretory, system found in flatworm?
AContractile vacuole
BNephridium
CFlame cell
DMalplghlan tubule
EKidney
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Question 1978
waec1993
The respiratory organ found in the cockroach is the
Aair sac
Btrachea
Clung book
Dlung
Egill
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Question 1979
waec1993
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
Aconcentration gradient across the respiratory surface
Bconcentration gradient across the respiratory surface B. presence of thin membrane as the respiratory surface
Clast transportation of absorbed gases
Dpresence of large surface area of the respiratory organ
Epresence of small, dry surface area of the respiratory organ
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Question 1980
waec1993
Which of the following blood vessels carries oxygenated blood into the heart?
