Jamb 1980 Biology Questions
Question 11:
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:
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:
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:
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:
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