Osmosis

Q. Root hairs absorb water from the soil by the process of osmosis

1. True
2. False

Q.

Explain the importance of osmosis for living beings.

Q. What is osmotic pressure

Q.

Osmosis is the movement of _________ molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.

1. Semipermeable
2. Impermeable
3. Permeable
4. None of these

Q. How does osmosis help in the absorption of water in the roots?

Q.

As a result of Osmosis, the volume of the concentrated solution______.

1. Gradually Increases

2. Gradually Decreases

3. Suddenly Increases

4. Remains Constant.

Q.

What is difference between osmosis and diffusion?

Q. The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as

1. Osmosis
2. Active absorption
3. Passive absorption
4. Diffusion

Q.

Osmosis occurs always through a________ membrane.

Q.

Look at the figure given below. Draw another figure of the same set-up as would be observed after a few hours.

Q.

List three points of differences between osmosis and diffusion.

Q.

Question 3
How would you test the presence of starch in leaves?

Q.

Name the following :

The process by which water enters root hairs.

Q. A semi-permeable membrane is stretched across a chamber filled with water.The membrane is only permeable to water. 60 mg of salt is added to the left side of the chamber.Which of the following is likely to occur?

1. Water will move towards the right side
2. Salt will move towards the right side
3. Water will move towards the left side
4. Salt will move towards the left side

Q. is the phenomenon by which roots draw water from the soil.

1. Diffusion
2. Osmosis
3. Filtration

Q.

Osmosis is the movement of solvent through a ___ membrane.

1. Semipermeable

2. Impermeable

3. Permeable

4. None of these

Q.

Osmosis is the way in which plants take up water.

1. True

2. False

Q. Root hairs absorb water from the soil by the process of osmosis

1. True
2. False

Q.

What is osmosis?

Q. Based on the figure given below which of the following statements is not correct?

1. The direction and rate of osmosis depends on both the pressure gradient and concentration gradient
2. Movement of solvent molecules will take place from chamber A to B
3. Movement of solute also will take place from A to B
4. Presence of a semipermeable membrane is a pre-requisite for this process to occur

Q.

Question 3
How would you test the presence of starch in leaves?

Q.

Name the process by which root hair absorb water from the soil.

Q. The movement of water through a semi-permeable membrane from a region of its higher concentration to a region of its lower concentration is specifically called:

1. Osmosis
2. Active Transport
3. Imbibition
4. Diffusion

Q.

Osmosis is the movement of:

1. Solute particles from lower concentration to higher concentration through a semi-permeable membrane.

2. Solvent particles from lower water potential to higher water potential

3. Solute particles from higher concentration to lower concentration through a semipermeable membrane

4. Solvent particles from higher water potential to lower water potential through a semi-permeable membrane

Q.

Name the following :

The process by which root hairs absorbs water from soil .

Q.

Given below is an incomplete explanation of certain biological process/ term where a key word has been left out. Rewrite the complete explanation by inserting the keyword in the space indicated by ^.

Osmosis is the movement of water molecules from its region of high concentration to its region of low concentration through a ‘^’ membrane.

Q. is the phenomenon by which roots draw water from the soil.

1. Diffusion
2. Osmosis
3. Filtration

Q.

Which of the following processes does not involve osmosis?

I. Entry of water from soil into root

II. Movement of water between xylem elements.

III. Opening and closing of stomata

IV. Sleeping movement of leaves

V. Transport of water through root cortex

1. I $\&$ III

2. III, IV $\&$ V

3. III $\&$ II

4. II only

Q. What do you mean by osmosis

Q. Find out the true statements

1. Water in the roots is transported through osmosis
2. Kidneys absorbs water from the blood through osmosis
3. Plant roots absorb water from the soil through osmosis
4. All of the above