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.
All hereditary characters in a cell are passed on from parent-cell to daughter-cell through the process of
Amitosis
Bmeiosis
Cfertilization
Dimplantation
Egestation
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Question 13
waec1989
Which of the following represents the phenotypic ratio, when a plant Rr is crossed with another plant Rr,
assuming that the gene R for round seed is dominant and wrinkled r is recessive?
A1:2:1
B2:2:1
C3:2
D3:1
E4:1
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Question 14
waec1989
At which of the following stages of cell division can the cell be said to be resting
AAnaphase
BTelophase
CProphase
Dinterphase
EMetaphase
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Question 15
waec1989
Breathing roots are characteristic structures of plants growing in
Amangrove swamp
Bdesert
Cshrub biome
Dsavannah
Etropical rain forest
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Question 16
waec1989
The term used in describing the effective management of national resources by man is
Apreservation
Butilization
Ceconomics
Ddevelopment
Econservation
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Question 17
waec1989
Which of the following is not an effect of overcrowding on a population?
ADeath
BCompetition
CCommensalism
DAggression
ECannibalism
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Question 18
waec1989
Maize is best stored against insect attack
Aon raised platforms
Bin fumigated silos
Cin a sunny area
Dwhile still on the cob
Ein humid metal tanks
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Question 19
waec1989
Which of the following methods is used in food preservation for a long period?
Aadding oil to food
BExposing food to fresh air
Ckeeping the food in a store
DWarming the food daily
ESalting and drying the food
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Question 20
waec1989
Which of the following. groups of organisms feeds directly on green plants?
AProducer
BDecomposer
CPrimary consumer
DSecondary consumer
ETertiary consumer
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Question 21
waec1989
The activities of an organism which affect the survival of another organism in a habitat can be described as
Abiotic factors
Bclimatic factors
Cphysiographic factors
Dedaphic factors
Eabiotic factors
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Question 22
waec1989
Pests can be controlled without the subsequent danger of polluting the ecosystem by
Aintroducing a population of species similar to that of the pest
Bincreasing the population of the natural enemies of the pest
Celiminating the natural enemies of the pest
Dkeeping the population of natural enemies of the pest constant
Espraying the ecosystem with pesticide
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Question 23
waec1989
Which of the following statements is not correct about the ecological effects of agricultural activities?
AThe use of herbicides and pesticides in farms can cause pollution
BBush-burning encourages desertification
CExcessive use of fertilizers in farms may have harmful effects
DTillage of tropical soils with ploughs and harrows may encourage erosion
EMonocropping is one of the cultural methods of controlling pests.
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Question 24
waec1989
Which of the following characteristics is associated with commensalism?
ABoth organisms are harmful to each other
BThe association involves many organisms
CThe association is beneficial to one of the organisms
DBoth species are beneficial to each other
EThis relationship is found only among higher plants
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Question 25
waec1989
Which of the following statements is not correct about food chains?
AAll food chains start with a green plant
BFood chains involve feeding relationships among organisms
Chorter food chains indicate more effective utilization of energy than longer ones
DThere is no energy loss in a food chain
EAll food chains have primary consumers.
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Question 26
waec1989
An association between living organisms in which one lives on and feeds at the expense of the other
organism is known as
Aparasitism
Bcommensalism
Cmutualism
Dsymbiosis
Epredation
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Question 27
waec1989
The translocation of food materials in plants takes place in the
Axylem
Bcambium
Cphloem
Dparenchyma
Esclerenchyma
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Question 28
waec1989
A dehiscent fruit formed from several fused carpels with many seeds is classified as
Aan achene
Ba capsule
Ca follicle
Da legume
Ea nut
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Question 29
waec1989
Which of the following is not an adaptation of the small intestine for absorption of digested food? The
Avilli are well supplied with blood and lymph vessels
Bvilli are numerous and thin-walled
Csmall intestine has large surface area
Dsmall intestine is long and coiled
Esmall intestine leads into the large intestine
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Question 30
waec1989
In photosynthesis, the following processes are part of the light reaction
except
Atransfer of radiant energy which reduces a co-factor
Babsorption of radiant energy by chlorophyll
Cutilization of the energy in the electron transfer chain to form ATP
