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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.

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5,032 questions

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Question 91

waec 2024

The bar chart above shows the data of sources of energy used for cooking in a community. Study it and answer questions 37 and 38.

The source of energy that is mostly used in the community is

Asolar

BKerosene

Ccoal

Dwind

View Explanation & Discuss

Question 92

waec 2024

A farmer planted many seeds on a small piece of land. The plants that germinated are as shown above.

Which of the following effects would not be observed among the population of the plants?

ARise in disease condition

BDeath

CMutualistic relationship

DCompetition

View Explanation & Discuss

Question 93

waec 2024

The phenomenon by which a farmland that is left to fallow for several years develops into a forest is called

ASuccession

Bafforestation

Cpopulation

Dcolonization

View Explanation & Discuss

Question 94

waec 2024

An environmental problem caused by Sulphur (IV) oxide is

Aacid rain

Bdeforestation

Cglobal warming

DErosion

View Explanation & Discuss

Question 95

waec 2024

Habitats of the organisms respectively are

Ariver and stream

Brainforest and stream

Cpond and leaf litter

Dgarden and desert

View Explanation & Discuss

Question 96

waec 2024

The diagrams above are the illustrations of organisms from different habitat. Study them and answer questions 32 and 33.

The structures labelled I are for

ACamouflage

BChemical offence

CPhysical defence

DMimicry

View Explanation & Discuss

Question 97

waec 2024

Which of the following gases is released during the decomposition of organic matter?

ACarbon(II) oxide

BSulphur (IV) oxide

CHydrogen Sulphide

DNitrous oxide

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Question 98

waec 2024

Grasses → Grasshoppers → Lizards → Hawks

If the individual species of organisms in the food chain are counted and arranged as a pyramid, the result would be a pyramid of

Anumbers

Benergy

Cbiomass

Dbiomes

View Explanation & Discuss

Question 99

waec 2024

The illustration below is a food chain. Study it and answer questions 29 and 30.
Grasses → Grasshoppers → Lizards → Hawks

Which of the following statements is not correct about the food chain? The number of

Agrasses eaten by grasshoppers is greater than the number of grasshoppers.

Bgrasses eaten by grasshoppers is fewer than the number of grasshoppers.

Cgrasshoppers eaten by lizards is greater than the number
of lizards.

Dlizards eaten by hawks is greater than the number of hawks.

View Explanation & Discuss

Question 100

waec 2024

The pathway through which nutrient are replenished and circulated in an ecosystem is called a

Acycle

Bpyramid of energy

Cpyramid of numbers

DFood chain

View Explanation & Discuss

Question 101

waec 2024

Discouraging the use of poison to kill fish in a large water body is a way of

Aimpoverishing the people.

Bconserving the fish species.

Callowing the fittest organism to survive

Dmaking the fish adapt to their environment

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Question 102

waec 2024

Sunlight is the major source of

AVitamin D

Bvitamin C

Cvitamin B

Dvitamin A

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Question 103

waec 2024

Which of the following food substances would give a negative reaction with Benedict's reagent?

AFructose

BGlucose

CGalactose

DSucrose

View Explanation & Discuss

Question 104

waec 2024

The process of food digestion in mammals would

Amake energy immediately available to the body

Bpromote growth and repair of tissues

Cprovide sufficient food materials within the body

Drender food substances soluble and absorbable

View Explanation & Discuss

Question 105

waec 2024

The element required for chlorophyll formation in plants is

AIron

BCalcium

CPhosphorus

DSulphur

View Explanation & Discuss

Question 106

waec 2024

The rate of photosynthesis decreases in a wilted herbaceous plant because the

Aenzymes in the leaf were denatured

Bchlorophyll in the leaves was not broken down

Camount of light reaching the plant was reduced

Damount of carbon dioxide entering the leaf decrease.

View Explanation & Discuss

Question 107

waec 2024

Which of the following events does not occur in the light reaction stage of photosynthesis?

AChlorophyll absorbs sunlight

BCarbon (IV) oxide combines with hydrogen

CPhotolysis of water occurs

DHydroxyl ions are produced

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Question 108

waec 2024

The Parachute-like tuft of hairs developed from the

Apedicel

Bpetals

Creceptacle

Dsepals

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Question 109

waec 2024

The diagram above illustrates a dry dehiscent fruit. Use it to answer questions 19 and 20.

The agent of dispersal of the fruit is

Aanimal

Bexplosive mechanism

Cwater

Dwind

View Explanation & Discuss

Question 110

waec 2024

The condition necessary for reproduction to occur between plants P and Q after pollination is that plants P and Q should be

Aof the same species.

Bbrightly coloured.

Cwell scented

Dof different species.

View Explanation & Discuss

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