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What is NOT characteristic of fresh water habitats?
Ahigh osmotic concentration
Blow oxygen concentration
Cthey are flooded during the rainy season
Dtemperature changes daily
Ethey have limited size-and depth
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Question 22
neco2002
In genetics, test cross is used to
Aconfirm the number of offspring in F1
Bconfirm the number of gametes present in parents
Ctest for heterozygosity
Dtest for X and Y chromosomes
Etest for the phenotypic ratio
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Question 23
neco2002
A pair of genes which controls a trait is described as
Aallele
Bdominant
Chybrid
Drecessive
Evariant
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Question 24
waec2002
Which of the following can be considered as a direct evidence of evolution?
AClassification
BComparative anatomy
CComparative embryology
DFossil record
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Question 25
waec2002
The following are social insects except
Awasps
Btermites
Cbees
Dcotton stainer
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Question 26
waec2002
Which of the following is an adaptation by plants to reduce the rate of water loss in a dry habitat? Possession of
Aa few sunken stomata on the lower epidermis only
Blong leaf tendrils
Cleaves with serrated edges
Dstrong tap root
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Question 27
waec2002
The genes affecting the same trait and are located at the same position on the homologous chromosomes
are called
Aautosomes
Balleles
Cloci
Dchromatids
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Question 28
waec2002
A man with heterozygous genotype for blood group B marries a woman with heterozygous A, what percentage
(%) of their children would be universal donor?
A50%
B25%
C15%
D10%
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Question 29
waec2002
In humans, sex is determined by
Atwo homologous chromosomes
Ba dominant gene for maleness present in a male
Ctwo similar sex chromosomes in the male and dissimilar in the female
Dthe differences in the nature of the X and Y chromosomes in the male.
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Question 30
waec2002
The name given to a sudden change in a gene or chromosome that can be passed on to the offspring is
Ainheritance
Blinkage
Calleles
Dmutation
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Question 31
waec2002
Which of the following is not a morphological variation in human beings?
ASize
BBlood groups
CColour
DFingerprints.
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Question 32
waec2002
When Mendel crossed round seeds with wrinkled seeds of Pea Plant, what was the ratio of wrinkled seeds
to round seeds in the F2 plants?
A3 : 1
B2 : 1
C1 : 3
D1 : 2
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Question 33
waec2002
Which of the following statements about blood groups in human is not correct?
ASiblings may not belong to the same blood group
BThere are four possible blood groups
CPeople with blood group O can receive blood from all other groups
DPeople with blood group AB are universal recipients
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Question 34
waec2002
Which of the following is a continuous variation, in human population?
ASex
BRh factor
CHeight
DDown`s syndrome
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Question 35
waec2002
Some species of animals and plants are considered as endangered, because
Athey are found in large numbers in most habitats
Bthey are harmful to theta natural habitats
Ctheir populations have become so small that they may soon die out
Dthey should be killed or only kept in cages
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Question 36
waec2002
Which of these statements is true about fingerprint patterns?
AConsistent for a lifetime
BMay be exactly the same for two individuals
CProminent only at puberty
DCorrelate with the individual blood group
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Question 37
waec2002
Wildlife conservation is enhanced by
Aenacting laws to encourage poaching
Bdiscouraging elimination of endangered species
Cencouraging creation of satellite hunting unit
Dsuppressing the activities of wildlife conservation agencies
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Question 38
waec2002
A vegetable farmer will benefit from a cattle rearer if
Athe faecal remains of the cattle are made available to the farmer
Bthe farmer makes available fresh green vegetables for consumption by the cattle daily.
Cthe farmer provides shelter for the cattle and the cattle rearer
Dthe cattle rearer makes available meat to the farmer daily
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Question 39
waec2002
Micro-organisms are important in recycling nutrients because
