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 number of chromosomes in a gamete is represented by
An
B2n
C4n
D23n
E46n
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Question 22
neco2005
Which of the following is NOT a type of exoskeleton?
ACartilage
BChitin
CHoot
DNail
EShell
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Question 23
neco2005
Which of the following enzymes requires acidic medium to function?
AAmylase
BErepsin
CMaltose
DPepsin
EPtyalin
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Question 24
neco2005
The following can increase crop production EXCEPT
Aerosion control
Bfertilizer application
Cmechanization
Dmonocropping
Epest control
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Question 25
waec2005
Which of the following is not an evidence of evolution?
AFossil records
BComparative embryology
CPolymorphism
DComparative anatomy
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Question 26
waec2005
A honey bee worker communicates with others on locating a source of food by
Adancing
Bstinging
Cinstinct
Dflares
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Question 27
waec2005
Territoriality is a phenomenon among
Alower organisms
Bplants of different species
Cmale animals with a group of females
Danimals and plants
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Question 28
waec2005
Which of the following organisms is a social insect?
AGrasshopper
BHoney bee
CButterfly
DHousefly
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Question 29
waec2005
Which of the following is not a correct base pairing on the DNA strand?
AAdenine, Thymine
BCytosine, Guanine
CGuanine, Cytosine
DUracil, Thymine
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Question 30
waec2005
In a living cell, factors which are responsible for inheritance are located
Aon the nuclear membrane
Bon the nucleolus
Con the chromosomes
Din the nucleoplasm
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Question 31
waec2005
Which disease is sex-linked and mainly afflicts male offspring?
ASickle cell anaemia
BHaemophilia
CDiabetes
DMalaria
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Question 32
waec2005
If two parents are sickle cell carriers then their genotypes would be
AHbA HbA and HbS HbS
B. HbS BbS and HbS BbS
CHbA HbS and HbA HbS
DHbA HbA and HbA HbA
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Question 33
waec2005
If the pink colour of a petal is dominant over white what would be the colour of the flower of the F generation when a pure pink flowered plant is crossed with a white flowered plant?
APurple
BPink
CWhite
DYellow
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Question 34
waec2005
A person with blood group B can only donate blood to individuals with blood groups
AA and B
BB and AB
CO only
DB only
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Question 35
waec2005
Which of the following is an example of physiological variation?
ABlood groups
BSkin colour
CFinger prints
DHuman height
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Question 36
waec2005
Variation which exhibits a wide range from one extreme to the other with very little difference between the intermediates is described as
Aphenotypic
Bdiscontinuous
Ccontinuous
Dgenotypic
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Question 37
waec2005
Which of the following statements about mutation is true?
AThe genotype is not affected
BThe genotype is affected
CThe phenotype is not affected
DIt cannot be induced by artificial means
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Question 38
waec2005
Which of the following is not a means of conservation?
AControlling excessive deforestation
BPrevention of poaching
CReplacing harvested mature trees with seedlings
DBurning of vegetation before cropping
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Question 39
waec2005
Conservation of wild life is necessary mainly because
Awild species cannot resist disease better than their domesticated species
Bmany predator wild animals help in control of pests
Cmany people derive pleasure from observing wild animals
Dit helps to prevent extinction of species
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Question 40
waec2005
Algal bloom depletes oxygen content of bodies of water polluted by
