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Which of the following is not an adaptation of plants or animals to desert environment?
AWell developed tap root system
BSmall leaves with thick epidermis
CStems with spike-like leaves
DMetabolic waste in the form of uric acid in some animals
Ebroad leaves for storage
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Question 12
waec1992
Which of the following is not an adaptation of plants or animals to desert environment?
AWell developed tap root system
Bsmall leaves with thick epidermis
CStems with spike-like leaves
DMetabolic waste in the form of uric acid in some animals
EBroad leaves for storage
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Question 13
waec1992
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 14
waec1992
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 15
waec1992
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 16
waec1992
The following are features of the tropical rain forest except
Aabundant water supply
Bloose and moist soil
Cshort trees growing benealth tall trees
Dscanty trees with small leaves
Epresence of many animals
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Question 17
waec1992
Which of the following best describes a marine habitat?
Alarge body of water
Bwhich has no distinctive color or taste
Cwith high concentration of salt
Dwith little suspended materials
Ewith no water weed
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Question 18
waec1992
What type of relation exists between a tapeworm and an infected mammal?
ASymbiosis
BCommensalism
CPredation
DParasitism
ESaprophytism
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Question 19
waec1992
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 20
waec1992
Which of the following mineral salts is a trace element?
AZinc
BCarbon
CHydrogen
DPotassium
ECalcium
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Question 21
waec1992
Which of the following is not a courtship behaviour exhibited by animals
APairing
BDisplay
CSeasonal migration
DHibernation
ETerritorialism
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Question 22
waec1992
The groups of sensory cells found on the upper surface of the tongue are called
Aampullae
Btaste buds
Cnerve cells
Dsomatic cells
Etactile cells
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Question 23
waec1992
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 of 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 acrossthe membrane
ECalcium ions accumulate on the upper side of the axon
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Question 24
waec1992
Which of the following is a structures functions as an excretory system found in flatworm?
AContractile vacuole
BNephridium
CFlame cell
DMalpighiam tubule
EKidney
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Question 25
waec1992
Ultrafiltration in the kidney takes place in the
Aloop of Henle
Brenal vein
CBowman's capsule
Dpelvis
Epyramid
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Question 26
waec1992
Which of the following organs is associated with deamination of proteins?
Alung
Bstomach
Ckidney
Dliver
Eheart
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Question 27
waec1992
The respiratory organ found in the cockroach is the
Aair sac
Btrachea
Clung book
Dlung
Egill
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Question 28
waec1992
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
Aconcentration gradient across the respiratory surface
Bpresence of thin membrane as the respiratory surface
Clast transportation of absorbed gases
Dpresence of larg surface area of the respiratory organ
Epresence of small, dry surface area of the respiratory organ
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Question 29
waec1992
The conditions that ensure successful exchange of gases in multicellular organisms include the following except
Aconcentration gradient across the respiratory surface
Bpresence 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 30
waec1992
Which of the following blood vessels carries oxygenated blood into the heart?
