ECOLOGY - Jamb Biology Past Questions and Answers

Question 151:

• JAMB 1997

In a soil sample, the relative amouunts of the different soil particles can best be determined by the process of

A. Filtration
B. Centrifugation
C. Precipitation
D. Sedimentation

Question 152:

• JAMB 1997

Which is the most important pollutant of the marine environment in Nigeria?

A. Insecticides
B. Sewage
C. Oil
D. Inorganic fertilizers

Question 153:

• JAMB 1998

The heart of the adult frog consist of

A. Two auricles and two ventricles
B. One auricle and one ventricle
C. Two ventricle and one auricle
D. One ventricle and two auricles

Question 154:

• JAMB 1998

A group of organisms of different species living in a particular area is described as a

A. Colony
B. Community
C. Population
D. Niche

Question 155:

• JAMB 1998

Which of the following is the direct consequence of transferring energy from one trophic level to another?

A. An increase in biomass
B. A decrease in the efficiency
C. An increase in the total numbers of resulting individuals
D. A decrease in the resulting biomass