ECOLOGY - Jamb Biology Past Questions and Answers

Question 166:

• JAMB 2000

The soil becomes toxic to plants when the concentration of its essential elements is in the range labelled

A. IV
B. III
C. II
D. I

Question 167:

• JAMB 2000

The range at which soil essential elements concentration is recorded for optimal plant growth is marked

A. IV
B. III
C. II
D. I

Question 168:

• JAMB 2000

In a food chain, each succeeding level in a forward direction represents

A. An increase in the number of individuals
B. A decrease in the number of individuals
C. An increase in the biomass of individuals
D. A gain in the total energy being transferred

Question 169:

• JAMB 2000

The factors that determine the distribution of vegetation zones are

A. Temperature, light, rain and humidity
B. Light, humidity, air and mist
C. Temperature, light, air and humidity
D. Humidity, snow, frost and dew

Question 170:

• JAMB 2000

The pollutants that contribute to the depletion of the ozone layer in the atmosphere are

A. Radioactive materials
B. Oxides of sulphur
C. Oxides of carbon
D. Chlorofluorocarbons