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 bones of the legs of a six years old boy are observed to be weak and crooked. Which of the following elements
were deficient in his mother’s diet at pregnancy?
ASodium and iron
BIron and manganese
CCalcium and phosphorus
DMagnesium and sulphur
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Question 782
waec2012
Excess carbohydrates can be stored in the muscles in the form
Acellulose
Bglycogen
Cchitin
Dlipids
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Question 783
waec2012
The purpose of proteins in the diet of a mammal is to
Apromote growth and repair cells
Bbreak down molecules
Cregulate the flow of chyme
Dserve as co-factors or enzymes
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Question 784
waec2012
Which of the following substances must be present in the soil for growth of a healthy green plant?
AAmino acids
BCarbon
CGlucose salts
DMagnesium ions
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Question 785
waec2012
What is the benefit of thunder and lightning to farmers?
AAddition of nitrates to the soil
BAeration of the soil
CRemoval of harmful bacteria from the soil
DAddition of rain water to the soil
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Question 786
waec2012
The main raw materials required for photosynthesis are
Aoxygen and water
Boxygen and carbon dioxide.
Coxygen and chlorophyll
Dcarbon dioxide and water
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Question 787
waec2012
The major role played by accessory pigments during photosynthesis is to?
Aadd colour to plants but not to trap light energy
Btrap light energy that chlorophyll cannot absorb
Ctransfer energy from chlorophyll to other pigments
Dprevent chlorophyll from absorbing unnecessary light
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Question 788
waec2012
Squirrels easily kill some trees because
Athey inject poisonous substances into the trees.
Bmost trees are susceptible to squirrel bites
Cthey feed voraciously on the roots
Dthey gnaw the bark and destroy
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Question 789
waec2012
The brightly coloured petals in some plants is an adaptive colouration for
Afeeding
Bpollination
Cdispersal
Dshedding
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Question 790
waec2012
An illustration of a human male reproductive system is shown above. Which
of the labelled parts can be cut to-ensure permanent sterility?
AI
BII
CIII
DIV
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Question 791
waec2012
Which of the following structures in a flower develops into the seed?
ATesta
Blntegument
COvule
DOvary
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Question 792
waec2012
When fertilization occurs that leads to formation of a zygote, which of the following processes takes place?
AThe tail of the sperm fuses with the egg cell
BBoth tail and head of the sperm fuse with the egg cell
CThe nucleus of the sperm fuses with the egg cell
DThe egg cell develops on its own without the sperm
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Question 793
waec2012
The hair on the human skin will stand erect when the person is
Ain an air-conditioned room
Bstrolling in the sun
Ctaking a hot drink
Ddoing strenuous exercise
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Question 794
waec2012
Which of the following parts of the eye contains light sensitive cells?
AChoroid
Biris
CRetina
DLens
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Question 795
waec2012
The function of the convex lens in the correction of eye defects is to
Adiverge light rays from far objects to focus image on the retina
Bconverge light rays to focus image behind the retina
Cconverge light rays to focus time image before the retina
Dconverge light rays from far objects to focus their image on the retina
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Question 796
waec2012
A student dissecting am animal specimen discovered that it had two auricle and on ventricle. The animal is likely to a/an
Afish
Breptile
Camphibian
Dbird
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Question 797
waec2012
Impulses are conducted towards the nerve cell through the
Amyelin sheath
Bdendrons
Caxons
Dsynaptic nodes
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Question 798
waec2012
The following are all examples of a simple reflex action, except
Aswallowing
Bsneezing
Cwalking
Dblinking
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Question 799
waec2012
Increasing adrenalin content of the blood would be expected to decrease the flow of blood to the
Aliver
Bheart
Clungs
Dbrain
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Question 800
waec2012
The diagram above is an illustration of the human excretory system. Which of the labelled parts contains the
highest amount of nitrogenous waste?
