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 slender, long and slightly curved beak of the sun-bird is an adaptation for breeding for feeding on
Anectar
Bsmall seeds
Cbig seeds
Dinsects
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Question 842
jamb1995
All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because
Athe egg determines the phenotype of the son
Bsons inherit the sex chromosome of their mothers
Cthe father's sex chromosomes is weaker in sons
Dsex-linked traits express dominance in females
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Question 843
jamb1995
The F1 of a cross between a tall and a dwarf plant was tall. The F1 was advanced to F2. How many of 120F2 plants will be dwarf?
A30
B60
C90
D120
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Question 844
jamb1995
A man with blood group a is married to a woman with blood group A. Which of the following group combinations is possible if the family has three children?
AB, A, AB
BO, A, B
CB, AB, AB
DA, O, A
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Question 845
jamb1995
The specific number of chromosomes in each somatic cell is represented by
A2N
B23
C2N
DN
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Question 846
jamb1995
The DNA molecule is a chain of repeating
Anucleosides
Bnitrogenous bases
Csugar phosphates
Dnucleotides
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Question 847
jamb1995
A person with type O blood can donate to a patient with type A because the donor's blood
Alacks antigens
Blacks anti-A antibodies
Clacks anti-B antibodies
Dhas both anti-A and anti-B antibodies
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Question 848
jamb1995
Human height is an example of a feature which depends on both
Agenotype and phenotype
Bgenetic and environmental factors
Cmother's genotype and environmental factor
Dphenotipic and environmental factors
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Question 849
jamb1995
Environmental pollutants which can work through the media of water, soil and air include
Acarbon monoxide
Bnoise
Csulphur(IV)oxide
Dsmoke
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Question 850
jamb1995
Some of the diseases caused by bacteria are
Atuberculosis, gonorrhoea and syphilis
Btuberculosis, gonorrhoea and AIDS
CPoliomyelitis, syphilis and gonorrhoea
DAIDS, cholera and tuberculosis
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Question 851
jamb1995
Which of the following is a measure for the control of bilharzia?
ACutting low brushes around homes
BApplication of molluscicides in water bodies
CScreening windows and doors with mosquito nets
DApplication of herbicides in water bodies
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Question 852
jamb1995
Colonization of a bare rock surface is termed
Aevolution
Bspecification
Cprimary succession
Dsecondary succession
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Question 853
jamb1995
In a tropical rain forest, non-epiphytic ferns and allies occur as
Amiddle storey species
Bupper storey species
Cshade-loving species
Demergent species
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Question 854
jamb1995
In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
Ait is produced by green plants during photosynthesis
Bit is produced during respiration of animals
Cit is absorbed inn ocean water
Dgreen plants release it during the day
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Question 855
jamb1995
In a food chain involving a primary producer, a primary consumer as well as a secondary consumer, the sharing of trophic energy is in the form that the
Athe primary consumer has more energy than the primary poducer
Bsecondary consumer takes up all the energy contents of the primary consumer
Cenergy is shared equally between the three groups of organism
Dsecondary consumer gets only a small portion of the energy contained in the primary producer
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Question 856
jamb1995
The depth of illumination in a water body can be measured with a
Aphotometer
Bsecchi disc
Chydrometer
Danemometer
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Question 857
jamb1995
Which of the following ions is involved in the conduction of the nerve impulse?
ACa2+
BK+
CH+
DMg2+
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Question 858
jamb1995
The gland directly affecting metabolic rate, growth and development is known as
Aadrenal land
Bthyroid gland
Cmammary gland
Dparathyroid gland
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Question 859
jamb1995
The process of walking is under the control of the part of the brain called
Aoptic lobe
Bolfactory lobe
Ccerebellum
Dmedulla oblongata
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Question 860
jamb1995
Biological growth refers strictly to an increase in the
