Waec Biology Past Questions and Answers

Question 471:

• WAEC 1997

The essential parts of a flower are

A. Petals and sepals
B. Anther and filament
C. Stigma and style
D. Androecium and gynoecium
E. Petals and gynoecium

Question 472:

• WAEC 1997

Which of the following parts of the tooth is first damaged during dental decay?

A. Cement
B. Enamel
C. Dentine
D. Root
E. Gum

Question 473:

• WAEC 1997

The set- up above is used to demonstrate

A. Plasmolysis
B. Osmosis
C. Suction pressure
D. Fermentation
E. Diffusion

Question 474:

• WAEC 1997

What will be the colour of the solution in the test tube labelled II at
the end of the experiment?

A. Pink
B. Yellow
C. Milky
D. Reddish white
E. Blue-black

Question 475:

• WAEC 1997

Which gas will pass into the test tube labelled II from I?

A. Carbon monoxide
B. Carbon dioxide
C. Oxygen
D. Ammonia
E. Nitrogen