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.
Sea water taken in by a living organism can be recycled into the atmosphere through all the following
processes except
Atranspiration
Bdigestion
Cexcretion
Drespiration
Edecay
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Question 892
waec1993
In which of the following processes is carbondioxide not given out?
ARespiration in plants
BDecay of organism
CBurning of organic matter
DBurning of fuels
EDuring photosynthesis.
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Question 893
waec1993
Which of the following explains the term pyramid of numbers?
AThe number of organisms in a trophic level
BThe relationship between plants in different trophic levels
CThe number of saprophytes and parasites in a habitat
DThe number of predators in a habitat
EProgressive decrease in the number of individuals from lower to higher trophic level
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Question 894
waec1993
The following are features of Northern Guinea Savanna except
Apresence of tall trees with thick bark
Bbare soil with very few trees
Cpresence of fire-resistant trees
Dabundant herbivores
Epredominance of woody trees.
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Question 895
waec1993
Which of the following best describes a marine habitat? A large body of water A
Awhich has no distinctive colour or taste
Bwith high concentration of salt
Cwith tittle suspended materials
Dwith no water weeds
Ewhich sustains no animal life
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Question 896
waec1993
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 897
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 898
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 899
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 900
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 901
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 902
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 903
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 904
waec1993
Which of the following mineral salts is a trace element?
AZinc
BCArbon
CHydrogen
DPotassium
ECalcium
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Question 905
waec1993
Which of the following is not a courtship behaviour exhibited of animals?
APairing
BDisplay
CSeasonal migration
DHibernation
ETerritorialism.
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Question 906
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 907
waec1993
Which type of eye defect IS illustrated in the diagram above?
AHypermetropia
Bmyopia
CCataract
DAstigmatism
EGlaucoma
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Question 908
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 909
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
