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.
A dairy farmer allowed only his best milk producing cows to mate. In succeeding generations of cows: milk production increased. This outcome is an example of
Aartificial selection
Bnatural selection
Ccompetition
Dcross fertilization.
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Question 952
waec2009
A man who is heterozygous for the disease haemophilia marries a woman who is double recessive for haemophilia. What percentage of their offspring would have the disease?
A0%
B25%
C50%
D75%
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Question 953
waec2009
DNA in eukaryotic cells is contained in the
Acentral vacuole
Bnucleus
Clysosome
DGolgi body
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Question 954
waec2009
The immediate product of meiosis in flowering plants is the
Asporophyte
Bgametophyte
Czygote
Dpollen grain
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Question 955
waec2009
Which of the following diseases is not hereditary?
AAlbinism
BScabies
CHaemophilia
DColour blindness
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Question 956
waec2009
The allele responsible for sickle-cell anaemia first appeared in the tropical and subtropical regions of Asia, the Middle
East and Africa. It entered the United States of America when individuals were forcibly brought over from Africa. In micro-
evolutionary terms this is an example of
Amutation
Bgene flow
Cgenetic drift
Dnatural selection
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Question 957
waec2009
The outward appearance or an organism is referred to as
Aphenotype
Bgenotype
Cdominance
Drecessiveness
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Question 958
waec2009
An example of continuous variation is
Afingerprint
Btongue rolling
Cblood grouping
Dbody size
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Question 959
waec2009
Variation is important in human life and can be used for the following activities except
Acrime detection
Bpopulation distribution
Cblood transfusion
Ddetermination of paternity
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Question 960
waec2009
Which of the following practices does not contribute to the preservation and improvement of the environment?
APollution reduction
BMaterial recycling
CReforestation
DOvergrazing
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Question 961
waec2009
A species whose populations has become so small that it may become extinct if not protected is a/an
Aspecial species
Bdangerous species
Cendangered species
Dimportant species
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Question 962
waec2009
Which of the following factors will most likely lead to overcrowding within a population?
AAbsence of predators
BEmigration
CFood shortage
DAbsence of territorial behaviour
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Question 963
waec2009
In ecological succession, since Iichens grow on bare rock, they are considered to be
Aprimary consumers
Bpioneer organisms
Cclimax organisms
Dproducers
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Question 964
waec2009
Population growth rate may be defined as the
Aortality rate per unit area over a period
Bnumber of times an organism occurs within a given period
Cnumber of a particular species per unit area
Dnet rate of natality and mortality in the habitat over a period.
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Question 965
waec2009
The following habitats can be used in the study of succession except
Asavanna grassland
Babandoned farmland.
Ca pond
Da well cultivated land
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Question 966
waec2009
Which of the following features is not an adaptation of plants to aquatic habitat?
ABreathing roots for entry of air
BFlowers raised above water for the purpose of pollination
CSpongy tissues containing gases for buoyancy
DHairy structures on the leaves to reduce water loss
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Question 967
waec2009
Most tropical plants shed their leaves during dry weather conditions in order to
Areduce their growth rate.
Bconserve water
Creduce competition
Dminimize the rate of photosynthesis
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Question 968
waec2009
which of the following organisms does not show colour adaptation to its environment?
AChameleon
BEarthworm
CFish
DToad
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Question 969
waec2009
Food chains are relatively short because
Aof energy recycling in the ecosystem
Benergy gain at each trophic level is high.
Cof energy loss at each trophic level
Denergy flow in an ecosystem is uni-directional.
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Question 970
waec2009
P → Q → R → S → T
Which of the following statements best describes the organism designated R? It
