Means of Transport

Q. In plants translocation takes place utilizing energy in the form of __.

1. glucose
2. ATP
3. sucrose
4. ADP

Q.

How do the roots of the plants absorb water?

Q.

Water will be absorbed by the root hairs when:

1. The concentration of salts in the soil is high.

2. The plant is rapidly respiring.
   

3. The concentration of solutes in the cell sap is high.
   

4. They are separated from the soil by a semi-permeable membrane.

Q.

Write true or false.​

(i) Diffusion is the movement of molecules from a region of their lower concentration to that of a higher one.

Q.

The process involved in the uptake of minerals from soil by the root hair is:

1. Osmosis

2. Active transport

3. Diffusion

4. Imbibition

Q.

When the water content of soil is low, the rate of transpiration__________.

1. none of these

2. decreases

3. increases

4. both a and b

Q.

Name the following.

An organism whose body is made up of a single cell.

Q.

The movement of molecules across membrane independent of other molecule is called:

1. Symport

2. Cotransport

3. Uniport

4. Antiport

Q.

Certain minerals in the soil are absorbed into plants by __________.

1. active transport

2. osmosis

3. diffusion

4. plasmolysis

Q.

How do substances like carbon dioxide and water move in and out of the cell. Discuss.

Q.

What characteristic is shared by simple diffusion and facilitated diffusion?

1. Both require cellular energy for the transport of substances.

2. Both involve the movement of water across a semipermeable membrane.

3. Both require a special carrier molecule to move substances across the membrane.

4. Both involve the movement of a substance from regions of a higher concentration to lower concentration without cellular energy.

Q.

The movement of molecules across membrane independent of other molecule is called:

1. Symport

2. Cotransport

3. Antiport

4. Uniport