Jamb Biology 1991 Past Questions and Answers

Question 31:

• JAMB 1991

Vegetation propagation is described as asexual reproduction because

A. Reproductive organs are not involved
B. New individuals are not formed
C. Many new plants are produced
D. There is no exchange of genetic materials

Question 32:

• JAMB 1991

Epigeal germination can be found in

A. Sorghum
B. Maize
C. Millet
D. Groundnut

Question 33:

• JAMB 1991

A dwarf plant can be stimulated to grow to normal height by the application of

A. Thyroxin
B. Gibberellin
C. Insulin
D. Kinin

Question 34:

• JAMB 1991

The greatest contribution to genetic studies was made by

A. Thomas Morgan
B. Gregor Mendel
C. Charles Darwin
D. Robert Hooke

Question 35:

• JAMB 1991

The exchange of genes between homologous chromosomes is called

A. Test cross
B. Back cross
C. Crossing-over
D. Mutation