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Which of the following processes will not introduce carbondioxide into the atmosphere?
ABreathing
BPhotosynthesis
CRespiration
DPutrefaction
EBurning
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Question 2
waec1989
The large intercellular air spaces which penetrate the tissues of most hyrophytes provide a pathway through
which
Acarbondioxide absorbed by leaves can diffuse to the roots
Boxygen produced in the leaves can diffuse to the submerged parts
Csalts absorbed by roots can reach other parts of the plant
Dplant hormones are transported to various parts
Emanufactured food is translocated
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Question 3
waec1989
Which of the following is an example of reproductive adaptation?
ASucculent stems of cactus plant
BChanging colour of chameleon
CPossession of spines by desert plants
DNeck colouration in Agama lizard
ELeaf-shedding in trees
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Question 4
waec1989
The theory that new organs or characteristics develop in organisms when there is a need for them was
postulated by
ACharles Darwin
BJean Lamarck
CGregor Mendel
DWallace
ELouis Pasteur
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Question 5
waec1989
Which of the following is not true about a bacterial colony growing on an agar plate?
AThey are visible without the aid of the microscope
BBacterial cells found in one colony often belong to one species
CDifferent colonies have different colours
DOnly one species of bacterial colony can grow on a culture at any time
EColonies growing on an agar plate under the same conditions must belong to one species
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Question 6
waec1989
Which of the following organelles are likely to be present in cells that are actively respiring and
hotosynthesizing?
ANucleoli and centrioles
BLysosomers and ribosomes
CEndoplasmic reticulum and Golgi bodies
DChloroplasts and mitochondria
EFood vacuoles and contractile vacuoles
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Question 7
waec1989
The scientist who discovered the honey-comb structure of the cell was
ARobert Hooke
BFelix Dujardin
CMathias Schleiden
DTheodore Schowann
ELouis Pasteur
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Question 8
waec1989
The autonomic nervous system comprises
Asympathetic and parasympathetic systems
Bcranial and sacral nerves
Cbrain and cranial nerves
Dspinal cord and spinal nerves
Ebrain and spinal nerves
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Question 9
waec1989
Over-crowding in seedlings of different species is less serious than over-crowding involving one species
because different species may
Ahave different nutritional needs
Black the same nutrient
Cbe active at the same time
Dhave similar tolerance
Eneed equal spacing
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Question 10
waec1989
The term afforestation is used in describing
Aharvesting of natural forest resources
Bplanting trees of value to man
Cfallowing of forestland
Dfelling of trees in the forest
Erecycling of waste forest products.
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Question 11
waec1989
The inability of some individuals to perceive the taste of some substances is an example of
Aindividual adaptation
Bphysiological variation
Cmorphological variation
Dmorphological adaptation
Ephysical variation
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Question 12
waec1989
The spaces between neutrones through which impulses cross by means of chemical reaction are called
Aaxons
Bganglia
Csynapses
Ddendrites
Epia mater
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Question 13
waec1989
Which of the following fixes atmospheric nitrogen?
ARhizobium
BNitrosomonas
CNitrobacter
DPutrefying bacteria
EDenitrifying bacteria
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Question 14
waec1989
Group instinct or social behaviour is not displayed in
Asoldier ants
Bbees
Cchickens
Dweaver birds
Etermites
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Question 15
waec1989
One of the methods of preventing measles is by
Asleeping under mosquito net
Battacking the vectors
Cattacking the secondary host
Dvaccinating young children
Eproviding clean water supply
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Question 16
waec1989
Which of the following effects would desertification have on the
ecological balance represented in the diagram above? The calorific
value' of the energy
A. 10 x 104k cal obtained from the sun would decrease
B10 x 104k cal obtained from the sun would increase
C6 x 104k cal obtained at level I would increase
D1 x 104k cal obtained at level V would increase
E3.5x 104k cal obtained at level II would increase
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Question 17
waec1989
What phenomenon in ecosystem does the diagram illustrate?
APyramid of numbers
BFood web among organisms
CPyramid of energy
DPyramid of biomass
EEvolutionary trend in organisms
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Question 18
waec1989
The similarity between the bone structure of the arm of a human and the fore-limb of a
rabbit indicates
Aadaptive radiation
Bcontinuous variation
Ca common origin
Dconvergent evolution
Eadaptation to the same environment
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Question 19
waec1989
The evidence for evolution can be obtained from the following except
Afossil
Banatomy
Chistory
Dembryology
Etaxonomy.
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Question 20
waec1989
What is the name given to the structure labelled A at this stage of cell division
