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 these is not a true characteristic of the tropical rain forest?
AVegetation consists predominantly of tall trees, with thick canopy
BForest is rich in epipphysis and climbers
CAnnual rainfall is less than 100 cm
Dinterior has low light intensity, high humidity and damp floor
EFruits of trees are often large-sized and are generally without adaptation to wind dispersal
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Question 1822
waec1996
The entire habits and habitat of an organism can be described as its
Aecological community
Becological niche
Chabitat factor
Dbiotic factor
Eabiotic factor
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Question 1823
waec1996
Which of the following processes is not due to interaction between the biotic and abiotic components of an
ecosystem?
ASoil nutrient depletion
BCondensation
CDecomposition
DOsmosis
EPhotosynthesis
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Question 1824
waec1996
Hydra captures small crustaceans by means of
Apseudopodia
Bmusculo-epithelial cells
Ctentacles
Denteron
Eectoderm
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Question 1825
waec1996
Which of the following is responsible for the conversion of nitrites to nitrates in the nitrogen cycle?
ADenitrifying bacteria
BNitrifying bacteria
CLightening
DFungi
EBrown algae
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Question 1826
waec1996
In a water culture experiment, the culture solution in a transparent beaker turned green. What precaution
should have been taken to prevent the culture solution from turning green?
AChanging the culture solution regularly
BIncreasing the number of times the culture is aerated
CCovering the transparent beaker with black cloth
DAdding warm alcohol to bleach the green colour
ESterilizing the beaker in a hot oven before use
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Question 1827
waec1996
In grasshopper/cockroach digestion starts from the
Aoesophagus
Bcrop
Cgizzard
Dmidgut
Emouth
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Question 1828
waec1996
What is the importance of the part labelled II to the seedling?
It
Aprotects the foliage leaves
Bgrows into the first foliage leaves
Clater develops into the fruit
Dprovides the seedling with food
Eserves as the water reservoir for the seedling
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Question 1829
waec1996
The part labelled II represents the
Aroot
Bepicotyl
Chypocotyl
Dcotyledon
Ehilum
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Question 1830
waec1996
The part labelled I in A represents the
Aroot
Bradicle
Chypocotyl
Dshoot
Estem
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Question 1831
waec1996
Which of the following labelled structures is similar to the locomotory structure in
Euglena?
AI
BII
CIII
DIV
EV
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Question 1832
waec1996
Which of the following labelled structures secretes enzymes which facilitate penetration
of the egg?
AI
BII
CIII
DIV
EV
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Question 1833
waec1996
Which of the labelled structures is the nucleus?
AI
BII
CIII
DIV
EV
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Question 1834
waec1996
Which of the following pairs consists of gametes?
AOva and spermatozoa
BSpores and sporangium
CFlowers and pollen grains
DTestes and ovaries
EGametophyte and sporophyte
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Question 1835
waec1996
The most sensitive part of the retina is called
Ablindspot
Bconjuctiva
Cfovea centralis
Dchoroid coat
Esclerotic coat
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Question 1836
waec1996
Which of the following is the effect of continuous tillage on an ecological system?
AAddition of more. humus to the soil
BDecrease in productivity
CIncrease in yield
DImproved fertility
EPrevention of erosion
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Question 1837
waec1996
The maintenance of a constant internal environment of an organism is known as
Ahomeostasis
Bhomeorhesis
Cturgidity
Dhomoiothermy
Ediuresis
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Question 1838
waec1996
In which of the following groups is nephridium found?
ACrustaceans
BReptiles
CBirds
DMammals
EAnnelids
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Question 1839
waec1996
Which of the following statements about the lymphatic system is not correct?
AThe lymph vessels are always larger in size than the arteries
BThe flow of lymph is assisted by general muscular movement
CLymph flows only in one direction due to the presence of valves
DLymph is emptied into the blood circulatory system through a vein
ELymph node becomes swollen during serious infections
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Question 1840
waec1996
Which of the following is more concentrated in the blood within the renal artery than the blood within the
renal vein?
