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 gas produced during decomposition of matter is
Ahydrogen sulphide
Bcarbon monoxide
Cchlorine
Doxygen
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Question 34
waec2003
Which of the following environmental factors is not considered in a terrestial habitat?
ATemperature
BSunlight
CHumidity
DTurbidity
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Question 35
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Which of the following values showing the total biomass of organisms in a food chain represents the secondary consumer?
A40,000
B3,000
C20
D1
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Question 36
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Ecology is best defined as the study of
Athe characteristics of an environment
Bthe inter-relationship between living organisms and their environment
Cliving organisms in a particular area
Dthe habitats and wildlife
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Question 37
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The type of nutrition shown by Spirogyra is
Asymbiosis
Bholophytic
Cholozoic
Dchemosynthetic
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Question 38
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Good quality food will perform the following functions in humans except
Asupplying energy
Bproviding resistance against malaria
Csustaining growth
Dmaintaining health
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Question 39
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Which of the following essential substances is contained in vegetables?
AChlorophyll
BGlucose
CMineral salts
DCarbon dioxide
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Question 40
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Which of the following organisms exhibits extracellular digestion?
AMoulds
BGreen plants
CAlgae
DBryophytes
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Question 41
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Which of the following is considered to be the first product of photosynthesis?
AProtein
BEnergised chlorophyll
CHydroxyl ions
DStarch
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Question 42
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Which of the following groups of compounds are products of the light stage of photosynthesis? I. Ribulose bi-phosphate (RuBP) II. Nicotin amide di-phosphorous (NADPH2) III. Oxygen (O 2) IV. Adenosine Triphosphate (ATP)
AI,II and lll
Bl, lll and lV
Cll,lll and lV
Dl, ll, lll and IV
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Question 43
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In the test for starch, the leaf is first placed in boiling water to
Aremove the chlorophyll
Bdissolved the waxy cuticle
Ckill and make the leaf permeable
Dturn it blue-black
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Question 44
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Which of the following statements about water in humans is not correct? it
Aplays an important role in temperature regulation
Bacts as solvent for substances conveyed around the body
Cplays a role in the formation of vitamin
Dis needed for many life processes
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Question 45
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The function of the amniotic fluid in humans is to
Aprotect the foetus against shocks
Bremove waste products from the foetus
Csupply food and water to foetus
Dcarry oxygen to the foetus
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Question 46
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Placentation of plants is best described as the
Aarrangement of ovules in the ovary
Barrangement of fruits on the branches
Cdevelopment of ovules in the ovary
Dformation of the pericarp from the ovary wall
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Question 47
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The layer of light-sensitive cells in the human eye is called the
Acornea
Bsclerotic layer
Cretina
Dconjunctiva
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Question 48
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Which of the following is the function of the iris of the mammalian eye?
Acloses and opens the eye
BAbsorbs dangerous rays from sunlight
Cregulates the amount of light entering the eye
Dbringing light rays to focus on the retina
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Question 49
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The part of the nervous system that interprets blinking of the eye is the
Aspinal cord
Bcerebrum
Chind brain
Dolfactory lobe
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Question 50
waec2003
The endocrine gland secreting hormone that induces the thyroid gland to produce more thyroxine is
