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 association between guinea worm and tissues of man is called
Acommensalism
Bparasitism
Cpredation
DSaprophytism
ESymbiosis
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Question 23
neco2003
Which of the following factors affect population?
Acompetition and natality rate
Bheat and space
Cfood and mortality rate
DSpace and competition
EWater and light
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Question 24
neco2003
When a plant shows reddish leaves, the soil is deficient in
Acalcium
Biron
Cnitrogen
Dphosphorus
Esulphur
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Question 25
waec2003
In natural selection, Darwin proposed that evolution occurred because of the following conditions except
Afood and other needs are abundant
Bthere is a fierce competition among the offsprings
CThat the weaker offsprings are eliminated
DThat nature selects those that will survive to reproduce their kind
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Question 26
waec2003
Which of the following is not a behavioural adaptation used by social animals?
ACryptic
BMimicry
CFlash
DSeason
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Question 27
waec2003
Sickle-cell anaemia has persisted in the human race due to
Alack of proper medical care for sicklers
Bcarriers being more resistant to malaria
Cmosquito vectors
Dwildlife intermediate hosts
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Question 28
waec2003
In Mendel's experiments, it was discovered that the skin of an African can be attributed to
Aa blending of black and white genes
Brecombination of genes
Closs of the epidermis
Dmutation in the skin cells
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Question 29
waec2003
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.Which of the following represents the genotypes of the parents if R is for red gene and r for white gene?
ARR X Rr
BRR X rr
Crr x rr
DRr x Rr
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Question 30
waec2003
In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation.
Which of the following represents the phenotypic ratio of the above genetic cross?
A1:2:1
B4:1
C3:1
D2:2
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Question 31
waec2003
The organic molecule (s) present in the nucleus is/are
ADNA
BProtein, RNA andDNA
CRNA and ATP
DRNA
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Question 32
waec2003
Which of following pairs of scientists discovered the Rhesus factor in human blood?
AHooke and Lavine
BDarwin and Landsteiner
CLandsteiner and Lavine
DHooke and Darwin
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Question 33
waec2003
Which of the following is an example of discontinuous variation?
Athe range in height of a pea plant from 30cm to 50cm
BOffspring, including the two male cats and three female cats
Cthe colour of pear plants grown in the dark
Dthe adult body weight ranging from 50 kg t0 95 kg
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Question 34
waec2003
Legumes incorporate nitrogen gas into their proteins because
Aof the presence of Azotobacter in their roots
Bthey possess root nodules containing Rhizobium
Cthey have a well developed root system
Dthey are autotrophic
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Question 35
waec2003
Forest conservation includes the following except
Aprevention of bush-fires
Bextensive felling of forest trees
Creplacing of harvested trees by planting seedlings
Dselective exploitation of forest trees
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Question 36
waec2003
Renewable resources are formed by
Aanimals that reproduce sexually
Borganisms confined to forest reserves
Corganisms that are constantly regenerating themselves
Dplants and animals that can reproduce sexually
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Question 37
waec2003
Viruses are pathogens of the following diseases except
Ameasles
Bsmallpox
Cpoliomyelitis
Dtuberculosis
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Question 38
waec2003
Rabbits cannot survive in an aquatic because they have
Afore-and hind-limbs
Bno gills
Cno fins
Dno scales
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Question 39
waec2003
Competition among individuals of a population increases the
Anumber of organisms
Bsurvival of the fittest
Cavailability of nutrient supplied
Denlargement of the territory
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Question 40
waec2003
Which of the following will have the least effect on the rate of change of the numbers in a population?
