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 effective cells involved in sickle-cell anaemia disease are
Aphagocytes
Blymphocytes
Cerythrocytes
Dthrombocytes
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Question 1032
waec2008
The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as
Amigration
Bmutation
Cmitosis
Dmeiosis
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Question 1033
waec2008
The observable characteristics of an individual usually resulting from the interaction between the gene composition and the environment is referred to as
Aallele
Bgenotype
Cphenotype
Dchromosome
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Question 1034
waec2008
Which of the following human traits in a class of school children may give an approximate normal distribution curve when the variation is plotted?
ABlood groups
BEar shapes
CSex distribution
DHeights
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Question 1035
waec2008
Which of the following characters is not an example of discontinuous variation?
ASkin color
BFingerprint
CAbility to roll tongue
DSex type
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Question 1036
waec2008
Which of the following statements about phenylthiocarbamide (PTC) is not correct?
ASome people BHG the taste of PTC to be bitter
BOthers find this substance to be tasteless
CAbility to taste this chemical is inheritable
DAbility to taste the chemical is hot inheritable
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Question 1037
waec2008
Which of the following substances is not recycled in an ecosystem?
ACarbon
BEnergy
CWater
DNitrogen
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Question 1038
waec2008
Conservation may be promote by
Aencouraging tree planting
Bsystematic deforestation
Covergrazing of pastures
Dunabated bush timing
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Question 1039
waec2008
To avoid over fishing in a lake, the following measures may be helpful except
Alimiting fishing periods
Bregulating the size of nets
Cfishing throughout the year
Dfish breeding exercise
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Question 1040
waec2008
Many diseases caused by bacteria can be treated and cured by using
Aantiseptics
Bantibiotics
Cantigens
Dantibodies
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Question 1041
waec2008
Which of the following activities constitutes biological control?
AA small bony fish transported on the back of a shark
BAdding manure to crops in a garden
CTilapia feeding on the larvae and pupae of mosquito
DA vulture feeding on the carcass of a goat
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Question 1042
waec2008
A vaccine is introduced into a person‘s body to
Adestroy all disease-causing organisms in the body
Bstimulate the body to produce antibodies
Cenhance the production of red blood cells
Disolate disease-causing pathogens from the blood.
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Question 1043
waec2008
The following observations concerning succession are true except that the
Apioneer community has fewer species
Bmiddle stages communities are most diverse
Cmax community has the greatest number of species
Dtotal biomass of the community increases as succession progresses
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Question 1044
waec2008
The effects of environmental degradation caused by human activities can be controlled by the following measures except
Areclaiming the land
Bconverting mining pits into fish ponds
Cresettling indigenous inhabitants
Deducating people
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Question 1045
waec2008
The speed of the flow of water in a river is faster in the middle than along the banks due to
Adifferences to turbidity at different parts of the river
Bthe abundance of fishes and other organisms along the bank
Creduced force of gravity in the middle portion of the river
Dresistance offered by the wall of the banks.
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Question 1046
waec2008
Shrubs do not survive on newly weathered soils because
Athe top soil is shallow
Bdrainage on such soil is poor
Chumus is absent from the soil
Dthe soil tends to be sandy
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Question 1047
waec2008
Pond weeds normally lack thick layers of cuticle because
Atheir system of photosynthesis is not efficient
Bthere is no danger of becoming desiccated
Ctheir leaves are either dissected or n bon-shaped
Dthere are numerous stoma a on their upper epidermis
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Question 1048
waec2008
Which of the following statements about the transfer of energy in the ecosystem is correct?
Aenergy increases at high trophic levels
BMore organisms can be supported at higher levels
CThere are fewer organisms at top tropic levels
DEnergy is lost at each trophic level
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Question 1049
waec2008
What would be the effect of taking the lion out of the web?
AThe number of organisms at each trophic level would increase
BMan would occupy the apex of the web
CThere would be more rabbit in the web
DThe energy reaching the remaining trophic would be increase
