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Which of the following components of Larmark’s theory of evolution is considered faulty?
AIndividuals of the same species growing under different environmental conditions differ from each other
BUse of certain organs result in development of those parts
CUnused organs degenerate
DChanges that result in individuals of the same species are transmitted to offspring
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Question 4
waec2011
Natural selection is a consequence of
Adistribution of organisms
Badverse conditions
Cvariation in organisms
Dinbreeding
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Question 5
waec2011
A man with blood group It IA IA is married to a woman with blood group IA IO. The blood group of their son is likely to be
AA
BO
CB
DAB
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Question 6
waec2011
What is the probability? of a man of blood group AB married to a woman of blood group O producing a child of blood group O?
A0%
B25%
C50%
D75%
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Question 7
waec2011
If a person has two alleles of the sickle cell anaemia gene, the person
Ais a heterozygous carrier of the disease
Bis immune to the disease and cannot pass it on to an offspring
Chas the disease
Dis probably of Asian ancestry
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Question 8
waec2011
Which of the following statements best describes protein synthesis?
ADNA is directly involved in translation
Btranslocation oft e ribosomes exposes a new codon for base pairing with an amino acid
CEach tRNA with a particular anticodon always carries a different protein in the process
DOne amino acid is always carried by more than one
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Question 9
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Differences in characteristics observed between individuals of the same species is known as
Atrait
Bphenotype
Cmutation
Dvariation
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Question 10
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Acquired characters are
Areceived from parents
Bpassed to offspring
Ccaused by the environment
Dcaused by mutation
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Question 11
waec2011
Which of the following statements is not true about continuous variation? It
Ais usually controlled by several genes
Bcan be influenced by environmental factors
Cfollows a normal distribution curve
Dis usually controlled by one or two pair(s) of genes
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Question 12
waec2011
Which of the following activities promotes forest conservation?
ALumbering
BUse of firewood for cooking
CAfforestation
DProduction of paper
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Question 13
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Which of the following practices improves crop yield in a clayey soil? Addition of
Amore water and humus
Blime and humus
Cfertilizers
Dweedicides and fertilizers
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Question 14
waec2011
Leguminous crops are incorporated into crop rotation in order to
Aimprove aeration of the soil.
Bpromote nitrogen fixation
Cincrease the rate of soil formation
Dimprove upon the water holding capacity of the soil
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Question 15
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Vaccination results in
Aaiding red blood cells to carry more oxygen
Bproduction of antibodies which destroy toxins of germs
Carresting excessive bleeding
Dproduction of white blood cells which engulf and digest bacteria.
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Question 16
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Which of the following methods does not make water fit for drinking?
AAddition of chlorine
BBoiling
CDistillation
DAddition of alum
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Question 17
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Assuming that a period of stable population size is followed by a period when natality increases by ten (1O) per cent and immigration increases by twenty (20) percent of population size. The population size will
Abe at equilibrium
Bincrease by forty (40) per cent
Cbegin to increase
Dbegin to decrease
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Question 18
waec2011
A sample of wet garden soil of known weigh was heated to constant weight. The loss of weight is due to loss of
Awater
Borganic matter
Cwater and organic matter
Dwater and inorganic matter
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Question 19
waec2011
The falling off of leaves of deciduous trees is helpful to the plant because it
Areduces the rate of transpiration
Benables the plant to conveniently eliminate its excretory products
Cenables the plant to bear more fruits
Densures that the limited mineral salts get to only growing regions
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Question 20
waec2011
A xerophyte conserves water by possession of the following features except
