SOIL - Jamb Biology Past Questions and Answers

Question 26:

• JAMB 1987

Nitrifying bacteria are important because they

A. Release nitrogen to the atmosphere
B. Convert atmospheric nitrogen to ammonia
C. Combine ammonia with nitrgen
D. Oxidize ammmonium salt to nitrates

Question 27:

• JAMB 1987

The process by which lime is added to clay soil is known as

A. Sedimentation
B. Flocculation
C. Leaching
D. Manuring

Question 28:

• JAMB 1987

Which of the plants is likely to have broad leaves and thin cuticle

A. R
B. S
C. T
D. U

Question 29:

• JAMB 1987

Which of the plants is likely to be desert species?

A. U
B. T
C. S
D. R

Question 30:

• JAMB 1988

Dead plants and animals are decomposed by bacteria and fungi into

A. Nitrate
B. Nitrites
C. Amino acids
D. Ammonium