Waec Biology Past Questions and Answers

Question 346:

• WAEC 1994

The part of the ear which equalizes air pressure on either side of the eardrum is
the

A. Auditory meatus
B. Malleus
C. Eustachian tube
D. Oval window
E. Stapes

Question 347:

• WAEC 1994

Mutation leads to evolution in that it

A. Gives rise to offspring which have the same characteristics as the parents
B. Kill all organism where it has occurred
C. Gives rise to new individuals which differs considerably from their parents
D. Always confers adaptability of the offspring
E. Does nit confer adaptability to the offspring

Question 348:

• WAEC 1994

The process whereby poisonous compounds are made harmless in the liver is called

A. Deamination
B. Glycolysis
C. Dehydration
D. Detoxification
E. Denitritication

Question 349:

• WAEC 1994

The deficiency of calcium in a plant may result in

A. Stunted growth and poor root development
B. Poor growth, leaves become orange or brown
C. Stunted growth, slender stem and yellowing of leaves
D. Very small leaves and yellowing of leaves
E. Tall weedy and reddish leaves, `

Question 350:

• WAEC 1994

Which of the following is the least safe method of birth control? Using

A. Spermicide creams
B. Contraceptive pills
C. Barriers such as condoms
D. Intrauterine device
E. The withdrawal method