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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.

2,099 questions JAMB 2572 WAEC 2099 NECO 351 CUSTOM 10

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Past Questions

2,099 questions

Question 1 of 20 2,099 total questions

Question 261

waec 2015

Which of the following organisms is an endo-parasite?

ATapeworm

BFlea

CTick

DAphid

View Explanation & Discuss

Question 262

waec 2015

Study the diagram above and answer the question

The structure labelled I is

Aa pitcher

Ban onion

Ca flower

Da tendril

View Explanation & Discuss

Question 263

waec 2015

Which of the following components make up an ecosystem?

ADecomposers, animals and non-living factors

BLiving and non-living factors

CPlants and non-living factors

DPlants decomposers and non-living factors

View Explanation & Discuss

Question 264

waec 2015

A community reaches a climax when

Aonly pioneer organisms are present

Bnew habitats are constantly being formed

Cthere is an introduction of new plants and animal species within the community

Dthe composition and size of a community remains constant over a long period

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Question 265

waec 2015

A person suffering from obstruction of the bile duct is advised not to eat fats and oil because

Abile digests fats and oil

Bfats and oil can only be absorbed whenbile is absent

Cbile emulsifies fat and oil

Dbile adds water to digesting food

View Explanation & Discuss

Question 266

waec 2015

Which of the following organs of the alimentary canal is not correctly matched with its function?

AGall bladder- stores bile

BLiver - stores glycogen

CAppendix - releases enzymes

DTeeth = grind food

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Question 267

waec 2015

A student used the following step in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
II. added dilute hydrochloric acid to the sugar solution and boiled it
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict's solution to the cooled solution in III.

The colour change to be observed in step IV is

Ablue-black

Bbrick-red

Cpurple

Dviolet

View Explanation & Discuss

Question 268

waec 2015

A student used the following steps in testing for a non-reducing sugar.

I. added Benedict's solution to the sugar solution

ll. added dilute hydrochloric acid to the sugar and boiled it;

lll. added sodium hydroxide solution to the solution in ll. and boiled;

IV. added Benedict's solution to the cooled solution in lll.

Use this information above to answer the question.

What is the importance of step ll in the testing process? To

Aneutralize the sugar solution

Bsoften the sugar solution

Cchange the colour of the sugar solution

Dincrease the acid content of the sugar solution

View Explanation & Discuss

Question 269

waec 2015

A student used the following steps in testing for a non-reducing sugar.

I. added Benedict's solution to the sugar solution

ll. added dilute hydrochloric acid to the sugar and boiled it;

lll. added sodium hydroxide solution to the solution in ll. and boiled;

IV. added Benedict's solution to the cooled solution in lll.

Use this information above to answer the question.

Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To

Aoxidize the sugar solution

Bhydrolyse the sugar solution

Cdry the sugar solution

Dincrease the volume of the sugar solution

View Explanation & Discuss

Question 270

waec 2015

The main difference between a seed and a fruit is that a fruit

Ais large while a seed is small

Bhas two scars while a seed is has one

Cis pigmented while a seed is not

Dcan be dispersed by animals while a seed cannot

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Question 271

waec 2015

Which of the following characteristic features is not associated with monocotyledonous plants?

AWell differentiated sepals and petals

BPresence of fibrous root system

CPresence of narrow leaves

DFlora parts are in multiples of three

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Question 272

waec 2015

Which of the following processes removes carbon (IV) oxide from the atmosphere?

ABurning fuels

BPutrefaction

CPhotosynthesis

DRespiration in plants

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Question 273

waec 2015

Ability of the human eye to focus images accurately on the retina is called

Aastigmatism

Bmyopia

Cadjustment

Daccommodation

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Question 274

waec 2015

A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the

Anose by extension

Bolfactory lobes of the brain

Cpassage from the nose to the brain

Dpart of the skull near the nose

View Explanation & Discuss

Question 275

waec 2015

A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses

Aauxin

Bgibberellins

Cabscisin

Dcytokinins

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Question 276

waec 2015

Blood pressure is higher in the arteries as a result of

Astress

Bcontraction and relaxation

Cblockage in the arteries

Dpresence of valves

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Question 277

waec 2015

A plant that commonly undergoes vegetative propagation by means of leaves is

AHibiscus

BBryophylum

CCrotalaria

DSpirogyra

View Explanation & Discuss

Question 278

waec 2015

Which of the following features could be used to determine the growth of a seedling?

ANumber of flowers

BNumber of leaves

CLength of flowers

DLength of radicle

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Question 279

waec 2015

Water and salts are both lost from the human body in

Abreath and sweat

Bbreath and Urine

Cbreath, urine and sweat

Dsweat and urine

View Explanation & Discuss

Question 280

waec 2015

When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become

Aplasmolysed

Bturgid

Cshortened

Delongated

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