Waec Biology Past Questions and Answers

Question 681:

• WAEC 2000

In commensalism

A. One of the organisms gains and the other loses
B. Both organisms benefit from the association
C. One of the organisms gains while the other neither gains nor loses
D. One of the organisms produces extra cellular Digestive juices.

Question 682:

• WAEC 2000

Parasitism can best be defined as an association between two organisms in which

A. Both organisms benefit
B. One organism gains and the other neither gains nor loses
C. Both organisms suffer some disadvantages
D. One organism gains and the other loses

Question 683:

• WAEC 2000

Which of the following best describes the adaptation of the earthworm to its habitat?

A. Living in burrow during the day to prevent desiccation
B. Burrowing into soft soil to store food
C. Possession of segmented body to reduce movement
D. Possession of a few bristles for defence

Question 684:

• WAEC 2000

Trypanosomiasis is associated with

A. Cockcroach
B. Mosquito
C. Housefly
D. Tsetse fly

Question 685:

• WAEC 2000

The major reason why foods should be properly covered is that

A. Micro-organisms in air would contaminate the food
B. Hot foods cool off easily when properly covered
C. The taste of the food is maintained when covered
D. All water easily evaporates from uncovered food