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Angiosperms and gymnosperms belong to the plants group known as
Aschizophyta
Bbryophyta
Cpteridophyta
Dspermatophyta
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Question 2102
jamb1991
The structure labelled 5 is used for
Aprotein synthesis
Benergy production
Csecretion
Dexcretion
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Question 2103
jamb1991
Which of the following structure is associated with aerobic respiration?
A1
B2
C3
D4
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Question 2104
waec1990
Which of the following statements is not associated with the theory of natural selection?
AThere is a struggle for existence
BThere is competition among the offsprings
CThe weaker offsprings are eliminated
DFood and other needs are abundant
ENature selects those that survive to reproduce their kind
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Question 2105
waec1990
What is the significance of the bee dance to other bees?
AWarning signal
BPresence of food
CMating signal by the male
DSoaring the enemies away
ETime for nuptial flight
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Question 2106
waec1990
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 2107
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 2108
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 2109
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 2110
waec1990
The genetic make-up of an organism is described as its
Aphenotype
Bgenotype
Ccharacter
Dchromosome
Eallele
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Question 2111
waec1990
A pair of genes which controls a trait is described as?
Adominant
Brecessive
Callele
Dvariant
Ehybrid
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Question 2112
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 2113
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 2114
waec1990
Water rises most rapidly in
Asandy soil
Bclayey soil
Csandy-loam soil
Dloamy soil
Ehumus soil
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Question 2115
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 2116
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 2117
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 2118
waec1990
Which of the following processes is not involved in the carbon cycle?
ABurning
BDecay
CTranspiration
DRespiration
EPhotosynthesis
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Question 2119
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 2120
waec1990
Which of the following types of soil has the highest water-retaining capacity?
