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.
Which of the following instruments would be most appropriate in comparing the air pressure at different places in the habitat?
AHygrometer
BBarometer
CPhotometer
DAir pressure disc
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Question 14
waec2012
The following are abiotic components of the ecosystem except
Abacteria
Btopography
Cwater
Dwind
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Question 15
waec2012
The area around the earth where life activities go on is referred to as
Abiosphere
Blithosphere
Chabitat
Decosystem
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Question 16
waec2012
A space containing a group of interactive organisms
is called
Acommunity
Bhabitat
Cecosystem
Dpopulation
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Question 17
waec2012
Which of the following food substances will have
little or no calorific value?
AProteins
BCarbohydrates
CLipids
DWater
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Question 18
waec2012
The appropriate food to be given to the child in the picture above is?
Abeans
Bgarri
Cbread
Davocado pear
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Question 19
waec2012
Which of the following digestive enzymes would be greatly affected if the liver fails to
produce bile?
AAmylase
BCellulase
CLipase
Drotease
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Question 20
waec2012
The diagram above is an illustration of an experimental setup to test the action of
yeast. What test would be used to confirm the nature of the gas given off at?
AInsert a glowing splint
BPass the gas through lime water
CInsert a piece of litmus paper
DSmell the gas
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Question 21
waec2012
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 22
waec2012
Excess carbohydrates can be stored in the muscles in the form
Acellulose
Bglycogen
Cchitin
Dlipids
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Question 23
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 24
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 25
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 26
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 27
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 28
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 29
waec2012
The brightly coloured petals in some plants is an adaptive colouration for
Afeeding
Bpollination
Cdispersal
Dshedding
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Question 30
waec2012
An illustration of a human male reproductive system is shown above. Which
of the labelled parts can be cut to-ensure permanent sterility?
