Jamb Biology 1980 Past Questions and Answers

Question 11:

• JAMB 1980

The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the

A. Amnion
B. Uterus
C. Placenta
D. Umbilical cord
E. Fallopian tube

Question 12:

• JAMB 1980

A true fruit is formed from

A. A fertilized ovary and other floral parts
B. A fertilized ovary
C. A fertilized ovary and calyx
D. A fertilized ovary and fleshy receptacle
E. An unfertilized ovary and other floral part

Question 13:

• JAMB 1980

Water is required for seed germination to take place because it

A. Activates the enzymes
B. Softens the testa
C. Liberates energy for growth
D. Permits radicle growth
E. Allow oxygen to diffuse into the seed

Question 14:

• JAMB 1980

A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that

A. The salt solution is more concentrated that the cell sap of the kolanut
B. The cell sap of the kolanut is more concentrated than the salt solution
C. The salt solution has the same concentration as the cell sap of the kolanut
D. Kolanut cell can multiply in water
E. The kolanut lost some water molecules to the salt solution

Question 15:

• JAMB 1980

The joint between the atlas and axis vertebrae allows for

A. Rotatory movement only
B. Up and down or nodding movements only
C. Rotatory and nodding movements
D. No movement at all
E. Slight movement