ECOLOGY - Jamb Biology Past Questions and Answers

Question 36:

• JAMB 1982

Which of these food chains is NOT possible in a forest?

A. Diatom → fly → toad → snake
B. Fly → toad → snake→ hawk
C. Leaves → antelope → man → lion
D. Leaves → caterpillar → bird → lion
E. Leaves →goat → man→ lion

Question 37:

• JAMB 1982

ONE of the major causes of haemophilia is lack of

A. Firbrinogen
B. Amylase
C. White blood corpuscles
D. Red blood corpuscles
E. Plasma

Question 38:

• JAMB 1982

If a farmer left his land uncultivated for five years before returning to it, he must be practising

A. Modern agriculture
B. Strip cropping
C. Contour ridging
D. Crop rotation
E. The bush fallow system

Question 39:

• JAMB 1982

A pyramid of numbers can be defined as

A. The number of plants and animals in an ecosystem
B. An arrangement of organism according to their habitat
C. The numerical relationships of a food chain
D. The number of plants and animals in a population
E. The total number of species and general in a community

Question 40:

• JAMB 1983

28 g soil sample was heated to a constant weight of 24 g. When further heated to red hot and cooled, it weighed 18 g. What is the percentage of humus in the soil?

A. 22.2
B. 55.6
C. 75.0
D. 25.0
E. 35.7