Waec Biology 2008 Past Questions and Answers

Question 41:

• WAEC 2008

Which of the following activities constitutes biological control?

A. A small bony fish transported on the back of a shark
B. Adding manure to crops in a garden
C. Tilapia feeding on the larvae and pupae of mosquito
D. A vulture feeding on the carcass of a goat

Question 42:

• WAEC 2008

Many diseases caused by bacteria can be treated and cured by using

A. Antiseptics
B. Antibiotics
C. Antigens
D. Antibodies

Question 43:

• WAEC 2008

To avoid over fishing in a lake, the following measures may be helpful except

A. Limiting fishing periods
B. Regulating the size of nets
C. Fishing throughout the year
D. Fish breeding exercise

Question 44:

• WAEC 2008

Conservation may be promote by

A. Encouraging tree planting
B. Systematic deforestation
C. Overgrazing of pastures
D. Unabated bush timing

Question 45:

• WAEC 2008

Which of the following substances is not recycled in an ecosystem?

A. Carbon
B. Energy
C. Water
D. Nitrogen