Biology Past Questions

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.

50 questions JAMB 2572 WAEC 2099 NECO 351 CUSTOM 10
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Past Questions

50 questions
Question 1 of 20 50 total questions
Question 11
waec 2019

If 90 ants are found in a field with a total area of 100 m. what is the population density of the ants?

A0.09
B0.90
C9.00
D90.00
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Question 12
waec 2019

The salinity of a brackish habitat________

Aincreases immediately after rainfall
Bincreases at the end of the rain
Cdecreases with an increase in the number of organisms
Dincreases during the dry season
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Question 13
waec 2019

The conversion of ammonium salts into nitrates is called_______

Aputrefaction
Bdenitrification
Cfixation
Dnitrification
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Question 14
waec 2019

Tooth decay is usually caused by___________

Aundigested and absorbed food
Beating a limited amount of sweetened food.
Cthe bacteria ín the mouth that metabolize sugar to acids
Deating a lot of proteinous foods
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Question 15
waec 2019

The digestion of proteins starts in the______

Asmall intestine
Bstomach
Clarge intestine
Dmouth
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Question 16
waec 2019

The major mineral present in the shell of Molluscs is________

ACopper
BSodium
CIron
DCalcium
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Question 17
waec 2019

Light is excluded from a water culture experiment in order to________

Aprevent overheating of the roots
Benable the roots to grow straight down
Cprevent ionization of water molecules
Dprevent the growth of algae
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Question 18
waec 2019

Which of the following forms of energy is utilized during photosynthesis?

APotential
BKinetic
CSolar
DChemical
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Question 19
waec 2019

Deficiency in insulin could lead to________

Acirrhosis
Bhepatitis
Cdiabetes
Dnephritis
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Question 20
waec 2019

The essential parts of the flower are labelled_______

AI, II and III
BII, III and IV
CIII, V and VI
DIV, V and VI
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Question 21
waec 2019

The diagram above is an illustration of the longitudinal section of a flower. Study it and answer this question

 

Which part of the flower is responsible for the protection of young flower buds?

AI
BII
CIII
DIV
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Question 22
waec 2019

The main function of the amniotic fluid is for______________

Arespiration in the foetus
Bprotection of the foetus from shock
CLubricating the birth canal foetus
Dnourishing the foetus
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Question 23
waec 2019

To focus on a distant object, the ciliary muscle of the eye______

Acontracts and the eye lens gets thicker
Brelaxes and the eye lens gets thinner
Ccontracts and the eye lens gets thinner
Drelaxes and the eye lens gets thicker
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Question 24
waec 2019

The function of the part labelled II is that it controls_______

Aposture and balance of the body
Ball voluntary actions
Ctemperature and appetite
Dmany involuntary actions
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Question 25
waec 2019

The diagram above is an illustration of a human brain. Study it and answer this question

 

The part labelled I is the_________

Aolfactory lobe
Bcerebellum
Ccerebrum
Dmedülla oblongata
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Question 26
waec 2019

Which of the following statements is not true about hormones?

ATheir responses are voluntary
BThey may affect more than one target organ
CThey are chemical messengers in animals
DThey are transported by the blood to the target organs
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Question 27
waec 2019

The process of maintaining a steady internal environment is known as__________

Aosmoregulation
Bequilibration
Chomeostasis
Dplasmolysis
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Question 28
waec 2019

Excretory products in plants responsible for the discoloration of flowers are called__________

Aalkaloids
Btannins
Canthocyanins
Dresins
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Question 29
waec 2019

The products of tissue respiration are_________

Aglucose, oxygen, and water
Boxygen, water, and energy
Cglucose, carbon dioxide, and energy
Dwater, carbon dioxide, and energy
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Question 30
waec 2019

The heart can beat continuously without being fatigued because it is composed of________

Askeletal muscles
Bsmooth muscles
Ccardiac muscles
Drenal muscles
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