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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.

2,572 questions JAMB 2572 WAEC 2099 NECO 351 CUSTOM 10

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2,572 questions

Question 1 of 20 2,572 total questions

Question 891

jamb 1993

In the illustration above, the genotypes of the offsprings are

A1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled

B1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled

C2 homozygous smooth : 2 wrinkled

D3 heterozygous smooth : 2 wrinkled

View Explanation & Discuss

Question 892

jamb 1993

During blood transfusion, agglutination may occur when

Acontrasting antigens reacts with contrasting antibodies

Bsimilar antigens react with similar antibodies

Ctwo different antigens react with each other

Dtwo different antibodies react with each other

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Question 893

jamb 1993

Which of the following is an example of discontinuous variation observed in man?

ASkin colours

BTongue rolling

CBody weight

DHeight

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Question 894

jamb 1993

Carbon monoxide poisons tissue by

Aconstricting the blood vessels

Bkilling the cells

Ccombining with haemoglobin

Drupturing the blood vessels

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Question 895

jamb 1993

What ecological condition favours the breeding of black flies?

AFresh water habitat

BWater in ponds and swamp

CWater in small containers

DFast flowing streams

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Question 896

jamb 1993

Soil fertility can be conserved and renewed by

Ayearly monocropping

Bcrop rotation and cover crops

Cbush burning to remove unwanted debris

Davoiding artificial manures

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Question 897

jamb 1993

Which group of plants would be the first colonizers in an ecological succession changing rocks to soil?

AMosses

BFerns

CLichens

DGrasses

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Question 898

jamb 1993

Plants adapted for life in salty marsh are called

Ahydrophytes

Bxerophytes

Chalophytes

Depiphytes

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Question 899

jamb 1993

Which of the following instruments is NOT used in measuring abiotic factors in any habitat?

AMicroscopic

BThermometer

CHygrometer

DWind vane

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Question 900

jamb 1993

Two organisms of different species, living in close association but not dependent on each other are referred to as

Aparasites

Bcommensals

Csymbionts

Dautotrophs

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Question 901

jamb 1993

At which trophic level would the highest accumulation of a non-biodegradable substance occur?

APrimary producers

BTertiary consumers

CPrimary consumers

DSecondary consumers

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Question 902

jamb 1993

The most important physical factor which affects an organism living in the intertidal zone of the seashore is

ApH

Bsalinity

Cwave action

Dtemperature

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Question 903

jamb 1993

Important abiotic factors which affects all plants and animals in the habitat are

Atemperature and turbidity

Brainfall and relative humididty

Csalinity and wind direction

Dtemperature and rainfall

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Question 904

jamb 1993

What is the term used to describe the sum total of biotic and abiotic factors in the environment of the organism?

AHabitat

BBiome

CEcosystem

DEcological niche

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Question 905

jamb 1993

Carnivorous plants are usually found in areas

Awhich are deficient of nitrate

Bwhich are deficient of oxygen

Cwith low pH

Dwhere insects are abundant

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Question 906

jamb 1993

What would happen to a man whose pancreas has been surgically removed?

AThe level of blood sugar would increase

BThe glycogen content of the liver would increase

CHis blood pressure would decrease

DHis weight would increase appreciably

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Question 907

jamb 1993

Which path does sound entering the human ear follow?

AOval window → ossicles → ear drum

BEar drum → oval window → ossicles

CEar drum → ossicles → oval window

DOssicles → ear drum → oval window

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Question 908

jamb 1993

When it is cold, the blood vessels of the skin

Adilates to increase the amount of blood flowing

Bconstrict to reduced the amount of blood flowing to the skin

Cdilate to reduce the amount of blood flowing to the skin

Dconstrict to increase the amount of blood flowing to the skin

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Question 909

jamb 1993

The function of the structure labelled G is to

Acarry out initial photosynthesis for the seedlings

Bprotect the young leaves from mechanical damage

Cprotect the young leaves from sun light

Dprotect the young leaves from insects pest

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Question 910

jamb 1993

In H, the cotyledons are carried above the soil because

Athe epicotyl grows faster than the hypocotyl

Bthe hypocotyl grows faster than the epicotyl

Cboth grow at the same rate

Dthe epicotyl outgrow the radicle

View Explanation & Discuss

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