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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 1091

waec 2007

The amount of energy passed from one trophic level to the next decreases because

Amany organisms are present at the first trophic level

Bmany organisms occur at the higher trophic level

Cmore energy is conserved at lower trophic levels

Dparts of the organisms remain unutilised at each trophic level

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Question 1092

waec 2007

Wind speed is measured with

Aa maximum-minimum thermometer

Ba hygrometer

Ca wet and dry bulb hygrometer

Dan anemometer

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Question 1093

waec 2007

Which of the following organisms are the producers in an aquatic habitat?

ABenthons

BPhytoplanktons

CZooplanktons

DNektons

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Question 1094

waec 2007

The term community is defined as

Athe different groups of plants and animals in the same area and interacting with each other

Bthe consumers and producers living in a habitat

Cliving organisms interacting with physical factors of an environment

Danimals which mutually derive benefit from their association.

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Question 1095

waec 2007

Which of the following features of the tadpole indicates that the animal is herbivorous? Possession of

Aoperculum

Bmuscular tail

Clong coiled intestine

Dinternal gills

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Question 1096

waec 2007

Which of the following protozoans feeds parasitically

AParamecium

BChlamydomonas

CPlasmodium

DEuglena

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Question 1097

waec 2007

Which of the following enzymes does not belong to proteases?

ASucrase

BPepsin

CTrypsin

DErepsin

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Question 1098

waec 2007

Which of the following enzymes is not one of the main classes of enzymes?

ASucrase

BAmylases

CProteases

DLipases

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Question 1099

waec 2007

Use the following equations to answer the question below
I - Boiled saliva + starch → X
II - Fresh saliva + starch → Y

What substances do X and Y represent?

AX = Maltose and Y = Sugar

BX = Starch and Y = Maltose

CX = Sugar and Y = Starch

DX = Maltose and Y = Starch

View Explanation & Discuss

Question 1100

waec 2007

Enzymes can be inactivated by certain chemical substances in the body called

Acatalysts

Binhibitors

Csubstrates

Dactivators

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Question 1101

waec 2007

'The colour that is associated with a positive iodine test is

Abrown

Bred

Cblue-black

Dyellow

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Question 1102

waec 2007

In a test for non-reducing sugars like sucrose, what is the significance of adding dilute hydrochloric acid to the original sugar solution? To

Ahydrolyse the non-reducing sugar

Baccelerate he rate of the reaction

Cstabilize the medium

Dsterilize the solution

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Question 1103

waec 2007

Biuret’s test is carried out on a food substance to indicate the presence of

Avitamins B

Bfats

Cproteins

Dstarch

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Question 1104

waec 2007

Micronutrients essential for the synthesis of chlorophyll include

Airon and potassium

Biron and magnesium

Cmagnesium and calcium

Dmagnesium and potassium

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Question 1105

waec 2007

The mode of nutrition common to green plants is

Aautotrophic

Bheterotrophic

Cholozoic

Dsaprophytic

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Question 1106

waec 2007

In testing for starch in a leaf, the leaf is boiled in alcohol to

Akill the cells

Bsoften the leaf

Cenable chemicals penetrate the leaf

Ddecolourise the leaf

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Question 1107

waec 2007

The site for production of a ATP in a cell is

Aribosome

Bcytoplasm

CGolgi body

Dmitochondrion

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Question 1108

waec 2007

In which of the following organisms is parental care manifested?

ATilapia

BToad

CCockroach

DSnail

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Question 1109

waec 2007

Protection of the body cells of mammals against ultra-violet rays of the sun is brought about by

Akeratin

Bmelanin

Csebum

Dscales

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Question 1110

waec 2007

A neurone that transmits impulses directly from sensory cells is called

Aan afferent neurone

Ban efferent neurone

Ca relay neurone

Da peripheral neurone

View Explanation & Discuss

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