Question

1. The following are the examples of diffusion, except ....
A. the release of vapor from the leaves
B. absorption of water by the root hairs
C. the entry of carbon dioxide into the leaf
D. dribbling dew (embun) from the leaves to the ground

2. The reason why the water from inside the soil can into the plant cells is ....
A. the water concentration inside the plant cells is higher than the concentration of
water outside the one cells
B. the solutes concentration inside the plant cells is equal to the solutes concentration
outside the one cells
C. the solutes concentration inside the plant cells is lower than the solutes concentration
outside the one cells
D. the solutes concentration inside the plant cells is higher than the solutes
concentration outside the one cells

3. A piece of potatoe if it put into the water, its mass will increase. And if it put into a salt
solution, its mass will decrease. From these statements, it proves about ....
A. osmotic pressure, the water’s particles flow from the lower concentration
B. osmotic pressure, the water’s particles flow from the greater concentration
C. difussion pressure, the water’s particles flow from the lower concentration
D. difussion pressure, the water’s particles flow from the greater concentration

4. The followings are functions of excretory system, except ….
A. to control the amount of salt in the body
B. to control the chemical substances in the body liquid
C. to dispose the waste substances produced by metabolism
D. to dispose the unused substances from the digestive system

5. The followings are functions of kidney, except ….
A. disposing the excessive substances (blood sugar) in the body
B. maintaining a balance of acids and bases
C. filtering the blood to produce urine
D. storing excess fat

Answer 1

1. D
2. C
3. A
4. D
5. D