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.
The process by which plants and animals are modified in structure, physiology and behaviour in order to survive is known as
Aevolution
Badaptation
Csuccession
Daggregation
Ehibernation
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Question 962
waec1990
Which of the following statements about the modifications of pentadactyl fore-limb is not correct?
AWings are modified for flying in birds
BFlippers are modified for grasping in sharks
CLegs are modified for walking and running in antelopes
DArms are adapted for grasping and holding in human beings
EFlippers are modified for swimming in whales
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Question 963
waec1990
Adaptive radiation as illustrated by the variety of forms in insects can be regarded as
Abehavioral modification
Ba case of rapid population growth
Ca physiological process
Dan evidence of evolution
Ea population control mechanism
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Question 964
waec1990
The precondition for transfusion of blood to an accident victim is
Aseeking the consent to his parents
Bascertaining the religious belief of the victim
Ccross-matching the blood group of the donor with that of the accident victim
Dcuring the donor of any disease traced in his blood
Erewarding the donor with food and money.
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Question 965
waec1990
The genetic make-up of an organism is described as its
Aphenotype
Bgenotype
Ccharacter
Dchromosome
Eallele
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Question 966
waec1990
A pair of genes which controls a trait is described as?
Adominant
Brecessive
Callele
Dvariant
Ehybrid
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Question 967
waec1990
When gametes from pure breeding parents with contrasting features such as tallness and shortness are
involved in monohybrid cross, the offspring in the first filial generation are usually
Apure breed
Bheterozygous dominant
Chomozygous recessive
Dmutants
Eco-dominant
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Question 968
waec1990
Thrombocytes are blood cells responsible for initiating
Aphagocytosis of bacteria
Bsynthesis of ribosomes
Cclotting of the blood
Dimmunity to certain infectious diseases
Eremoval of carbondioxide from tissues.
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Question 969
waec1990
Water rises most rapidly in
Asandy soil
Bclayey soil
Csandy-loam soil
Dloamy soil
Ehumus soil
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Question 970
waec1990
The conservation of natural resources can be achieved by the following except
Acreation of national parks
Bformation of conservation societies and agencies
Cestablishment of game reserves
Dderegulated harvesting
Emaking laws on conservation
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Question 971
waec1990
Water in the human body is derived from the following sources except through
Adrinking water
Bfood substances
Ccytoplasm of worn-out cells
Drespiratory activity
Eabsorption by the skin
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Question 972
waec1990
Which of the following processes are involved in a water cycle?
AEvaporation, condensation and precipitation
BEvaporation, percolation and transpiration
CEvaporation and precipitation
DEvaporation and transpiration
EPrecipitation and condensation.
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Question 973
waec1990
Which of the following processes is not involved in the carbon cycle?
ABurning
BDecay
CTranspiration
DRespiration
EPhotosynthesis
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Question 974
waec1990
Changes in energy flow between organisms in a habitat can be represented by a
Apyramid of biomass
Bpyramid of numbers
Cpyramid of energy
Dfood chain
Efood web
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Question 975
waec1990
Which of the following types of soil has the highest water-retaining capacity?
AClay
BLaterite
CLoam
DGravel
ESand
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Question 976
waec1990
Which of the following factors is not associated with aquatic habitat?
ATemperature
BLight intensity
CTurbidity
DWave action
EHumidity.
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Question 977
waec1990
Which of the following is not a way of reducing air pollution?
ASiting factories and power stations away from residential areas
BBuilding tall factory chimneys
CPassing waste gases through filters and absorbers
DUsing lead-free petrol in cars
ERecycling tins, cans and bottles
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Question 978
waec1990
Which of the following is an autotrophic mode of nutrition?
AChemosynthesis
BSaprophytism
CParasitism
DSymbiosis
ECommensalism
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Question 979
waec1990
Which of the following reagents is used for the test for starch?
