ECOLOGY - Jamb Biology Past Questions and Answers

Question 266:

• JAMB 2011

In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained
Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g
The percentage of humus in the soil sample is

A. 16.7%
B. 17.6%
C. 26.7%
D. 16.2%

Question 267:

• JAMB 2011

Which of the following is a feature of the population pyramid of a developing country?

A. Long lifespan
B. Low birth rate
C. Low death rate
D. Short lifespan

Question 268:

• JAMB 2011

The interaction of a community of organisms with its abiotic environment constitutes

A. Niche
B. A food chain
C. An ecosystem
D. A mirohabitat

Question 269:

• JAMB 2011

Habitats are generally classified into

A. Biotic and abiotic
B. Aquatic and terrestrial
C. Aboreal and marine biomes
D. Microhabitats and macrohabitats

Question 270:

• JAMB 2011

Drancunculiasis can be contacted through

A. Eating contaminated food
B. Drinking contaminated water
C. Bathing in contaminated water
D. Bites of blackfly