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Biology Past Questions

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

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2,099 questions

Question 1 of 20 2,099 total questions

Question 691

waec 2000

Which of the following solutions will induce the condition shown in the diagram?

AHypertonic solution

BHypotonic solution

Cisotonic solution

DDistilled water.

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Question 692

waec 2000

The condition shown in the above diagram is due to

Aconversion of starch to sugar

Bconversion of sugar to starch

Cexcess water in structure labelled I

Dpresence of carbondioxide in the structure labelled I

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Question 693

waec 2000

Which of the labelled structures in the diagram will shrink when plasmolysis
occurs?

BII

CIII

DIV

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Question 694

waec 2000

Which of the labelled structures in the diagram are involved with the entry
of carbondioxide for photosynthesis?

AI, II and III only

BI, II, III and VI

CI, II, V and VI

DI, II, III, and IV

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Question 695

waec 2000

When a mammal respires anaerobically for a long time

Apyruvic acid is convened into acetyl COA

Bmore energy is released from fats in the body

Clactic acid accumulates in the muscles

Dthe Krebs cycle is fully completed.

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Question 696

waec 2000

Which of the following structures is not present in the vascular bundles of a dicot stem?

AXylem

BPhloem

Clntra-fascicular cambium

DInter-fascicular cambium

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Question 697

waec 2000

The following are useful effect of micro-organisms except

Aproduction of vaccines

Bcuring of tobacco

Ctanning of leather

Ddecay of meat

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Question 698

waec 2000

Which of the following plant parts does not perform supportive function?

AParenchyma, xylem and . collenchyma

BEpidermis, sclerenchyma and xylem

CParenchyma, collenchyma and sclerenchyma

DSclerenchyma, xylem and collenchyma

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Question 699

waec 2000

Which of the following organisms has the largest surface area-to-volume ratio?

AMan

BEarthworm

CAmoeba

DGrasshopper

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Question 700

waec 2000

The following are the functions of supporting tissues in plant except

Arigidity

Bflexibility

Cstrengthening

Dsecretory

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Question 701

waec 2000

In which of the following organisms is ammonia excreted as a waste product?

AMan

BBird

CAmoeba

DSpirogyra

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Question 702

waec 2000

Which of the following statements is incorrect about diffusion?

AIt involves degradation of soluble particles in solvents

Bit occurs mainly in gaseous and liquid media

CNo membrane is needed to effect the movement of molecules

DMolecules move from region of lower concentration to that of higher concentration.

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Question 703

waec 2000

The presence of a large member of mitochondria in a cell indicates that

Ait has little cytoplasmic content

Bthe cell is very active

Cthe cell is dormant

Dthe respiration is poor

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Question 704

waec 2000

The plant cell mostly stores food as

Aglycogen

Bauxins

Chomtones

Dstarch

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Question 705

waec 2000

The unit contained in a cell structure responsible for changes in form and shape of organisms is called

Amitochondria

Bgene

Cribosome

Dlysosome

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Question 706

waec 2000

Which of these has the most complex level of organization?

AEuglena

BHydra

CHeart

DVirus

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Question 707

waec 2000

All the following organelles have membranes except

Anucleus

Bvacuole

Ccell membrane

Dcell wall

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Question 708

waec 2000

The hydra has two body layers of cells called

Aectodermis and enteron

Bectoderm and endoderm

Cendodermis and dermis

Depidermis and dermis

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Question 709

waec 2000

Which of the following best describes a colony of volvox?

AAsexually reproduced cells held together in a mass, but independent of each other

BSexually reproduced cells held together in a mass, and dependent on each other

CSingle free-living acellular units irrespective of their parental origin

DSeveral units of cells, held together by cytoplasmic strands and dependent on each other

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Question 710

waec 2000

Amoeba obtains its oxygen requirements

Afrom oxidising food substances

Bfrom air trapped in vacuoles

Cthrough diffusion of air into its body

Dthrough an air cavity in the ectoplasm

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