2000 WAEC Biology past questions and answers

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1
Amoeba obtains its oxygen requirements

A from oxidising food substances

B from air trapped in vacuoles

C through diffusion of air into its body

D through an air cavity in the ectoplasm



Correct Option: C


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2
Which of the following best describes a colony of volvox?

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

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

C Single free-living acellular units irrespective of their parental origin

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



Correct Option: A


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3
The hydra has two body layers of cells called

A ectodermis and enteron

B ectodemt and endoderm

C endodermis and dermis

D epidermis and dermis



Correct Option: B


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4
All the following organelles have membranes except

A nucleus

B vacuole

C cell membrane

D cell wall



Correct Option: C


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5
Which of these has the most complex level of organization?

A Euglena

B Hydra

C Heart

D Virus



Correct Option: C


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6
The unit contained in a cell structure responsible for changes in form and shape of organisms is called

A mitochondria

B gene

C ribosome

D lysosome



Correct Option: B


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7
The plant cell mostly stores food as

A glycogen

B auxins

C homtones

D starch



Correct Option: D


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8
The presence of a large member of mitochondria in a cell indicates that

A it has little cytoplasmic content

B the cell is very active

C the cell is dormant

D the respiration is poor



Correct Option: B


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9
Which of the following statements is incorrect about diffusion?

A It involves degradation of soluble particles in solvents

B it occurs mainly in gaseous and liquid media

C No membrane is needed to effect the movement of molecules

D Molecules move from region of lower concentration to that of higher concentration.



Correct Option: D


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10
In which of the following organisms is ammonia excreted as a waste product?

A Man

B Bird

C Amoeba

D Spirogyra



Correct Option: C


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