Symbiotic interactions of plants and animals - Jamb Biology Past Questions and Answers

Question 16:

• JAMB 1997

Which organism in the food-web illustrated above is an omnivore?

A. Weevils
B. Rat
C. Hawk
D. Prayer mantis

Question 17:

• 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

Question 18:

• JAMB 1999

The biomass is likely to increase in the sequence

A. 1→2→4→5
B. 1→3→4→5
C. 3→5→6→7
D. 5→4→3→1

Question 19:

• 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 20:

• JAMB 2001

An association between the root nodule of a leguminous plant and rhizobium sp, is known as

A. Commmensalism
B. Mycorrhiza
C. Parastism
D. Symbiosis