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 density-dependent factor that regulates the population size of organism is
ADisease
BSudden flood
CDrought
DFire outbreak
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Question 13
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The most important hormone that induces the ripening of fruit is
AEthylene
BIndole acetic acid
CGibberallin
DCytokinin
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Question 14
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The response of plants to external stimuli in a non-directional manner is known as
ATactic movement
BPhototropism
CGeotropism
DNastic movement
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Question 15
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An example of a caryopsis is
AGuava
BMaize grain
CCoconut
DTomato
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Question 16
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Homologous pairs of chromosome separate during
ACytolysis
BCleavage
CMitosis
DMeiosis
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Question 17
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The point marked I is referred to as
Amyelin sheath
Bdendrites
Caxon
Dnode of Ranvier
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Question 18
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The structure can be found in the
ASympathetic and parasympathetic nervous systems
BPeripheral and central nervous system
CPeripheral nervous system only
DCentral nervous system only
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Question 19
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Metabolic production of urea is carried out in the
Aurinary bladder and kidney
BLiver
CPancreas
DKidney and malphigian tubule
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Question 20
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In mammalian males, the excretory and reproductive systems share the
AUreter
Bvas deferens
CUrethra
DTestes
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Question 21
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The best method of propagating sugarcane is by
ASeeding sowing
BLayering
CGrafting
DStem cuttings
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Question 22
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The part of the mammalian digestive system where absorption of nutrient takes place is the
Aileum
Bcolon
Coesophagus
Dduodenum
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Question 23
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Organisms I, II, III and IV have surface/volume ratios of 1:2, 1:3, 1:4 and 1:5 respectively. The organism that is likely to have the most complex transport system is
AIV
BIII
CI
DII
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Question 24
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In the experiment, the layer of oil serves to prevent water loss
Atranspiration
Bevaporation
Cosmosis
Dguttation
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Question 25
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The experiment is used to demonstrate that
Aplants lose water through guttation
Btranspiration occurs through the leaves
Cwater is necessary for photosynthesis
Dleaves are important to photosynthesis
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Question 26
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The dark reaction of photosynthesis involves the
Areduction of carbon(IV)oxide to organic
Brelease of oxygen and the splitting of water
Cphotolysis of water and the production of starch
Dsplitting of water into hydrogen
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Question 27
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In the experimental set-up, the rubber sheet represents the organ called
Apleural cavity
Blungs
Cdiaphragm
Dintercostal muscles
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Question 28
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The aim of the experiment is to demonstrate
Athat in mammal gaseous exchange takes place in the lungs
Bthe part played by the pleural cavity and diaphragm in respiration
Cthat a large amount of oxygen is absorbed by the lungs
Dthe presence of carbon (IV) oxide in the exhaled air
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Question 29
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If water that has been coloured red is poured at the base of a wilting plant, it will appear as a red stain in the cells of the
Axylem
Bepidermis
Cphloem
Dparenchyma
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Question 30
jamb2003
The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with
