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Biology Past Questions

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Past Questions

50 questions

Question 1 of 20 50 total questions

Question 11

jamb 1991

Vegetation propagation is described as asexual reproduction because

Areproductive organs are not involved

Bnew individuals are not formed

Cmany new plants are produced

Dthere is no exchange of genetic materials

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Question 12

jamb 1991

A collection of achenes formed from several carpels of a flower is

Aa multiple fruit

Ban aggregate fruit

Ca shizocarp

Da simple fruit

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Question 13

jamb 1991

The function of the epididymis in mammals is the

Aexpulsion of urine

Bstorage of sperms

Ccirculation of blood

Dactivation of sperms

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Question 14

jamb 1991

Which of the following vertebrae lacks a centrum?

AAtlas

BAxis

CThoracic

DLumbar

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Question 15

jamb 1991

The movement of the whole organism to an external stimulus is termed

Atropism

Ba taxis

Ca nastic movement

Da phototropic movement

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Question 16

jamb 1991

Which of the following is a plant excretory product?

AOil

BCytokinin

CResin

DAmino acids

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Question 17

jamb 1991

Deoxygenation blood flows into the right and left lungs through the

Apulmonary vein

Bvena cava

Cpulmonary artery

Dsubclavian vein

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Question 18

jamb 1991

Fibrinogen and prothrombin play important roles in the

Adeamination of proteins

Bclotting of blood

Cdetoxication of substance

Dstorage of vitamins

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Question 19

jamb 1991

The process by which water moves from X to Y through the semi-permeable membrane is called

Adiffusion

Bosmosis

Cactive diffusion

Dosmoregulation

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Question 20

jamb 1991

After 30 minutes, the level of sugar solution in the above figure will?

Arise in x only

Brise in Y only

Cbe the same in X and Y

Dfall in Y

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Question 21

jamb 1991

Which of the following can bring about the greatest increase in the rate of transpiration?

AIncreased humidity

BReduced temperature

CReduced wind speed

DReduced humidity

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Question 22

jamb 1991

In the living cells, insufficient oxygen may cause a breakdown of glucose into?

Afatty acids

Blactic acids

Cglycogen

Dcarbon dioxide

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Question 23

jamb 1991

The crown of the mammalian tooth is covered with

Acement

Bdentine

Ccaries

Denamel

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Question 24

jamb 1991

The element common to protein carbohydrate and lipid is

Ahydrogen

Bsulphur

Cnitrogen

Dphosphorus

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Question 25

jamb 1991

One of the accessory organs of the digestive system is the

AKidney

BSpleen

Cliver

Dlung

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Question 26

jamb 1991

Which of the following is formed immediately after the first product of photosynthesis?

ALipid

BStarch

COxygen

DSugar

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Question 27

jamb 1991

A wide pith with a ring of conducting tissue is characteristic of the root of

Asunflower

Bmaize

Cbean

Dokra

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Question 28

jamb 1991

The gill raker of fishes take part in?

Afeeding

Brespiration

Cswimming

Ddiffusion

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Question 29

jamb 1991

The respiratory organ in the land snail is the

Aradula

Bmantle

Ctentacle

Dfoot

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Question 30

jamb 1991

The function of maxillipeds in crayfish is to aid

Awalking

Bswimming

Cfeeding

Drespiration

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