Transport of Water

Q.

How do water and mineral salts enter the cell membrane of the root hair?

1. Diffusion

2. Adsorption

3. Osmosis

4. Imbibition

Q.

What is sap in plants?

Q. Choose the components of xylem which conduct water and minerals.

1. Tracheids
2. Vessels
3. Sieve tubes
4. Fibres

Q.

How long osmosis usually take place or can continue?

1. Till the solute particles are completely exhausted across membrane

2. Equilibrium of water molecules across the membrane

3. Till the solvent molecules are completely exhausted across membrane

4. Till the addition of solvent is stopped across membrane

Q.

Hello

Please help me with the following

In case of osmosis if the concentration of the surrounding solution is the same as that inside the cell, in which direction will the net movement of water molecules be across the cell membrane?

Q. Which part of the plant helps to absorb water and minerals from the soil?

1. Root hairs
2. Roots
3. Root cap
4. Tap root

Q.

In what order do inhibition, diffusion and osmosis occur?

Q. What is actually osmosis? Define it.

Q. Assertion :Xylem transports water and dissolved mineral salts from the roots to the rest of the plant. Reason: Phloem translocates organic solutes from the leaves to various parts of the plant

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. The ascent of xylem sap depends on _______.

1. Cohesion of water molecules
2. Adhesion of water molecules
3. Transpiration pull
4. Root pressure

Q. Mostly minerals are absorbed from the soil by the plant:

1. Via a process dependent of water absorption.
2. Only when soil solution is hypotonic to cell sap.
3. Only when soil solution is hypertonic to cell sap.
4. None of the above.

Q. For diffusion or osmosis to take place in root cells ________ is essential.

1. only solute
2. solute concentration difference
3. only solvent
4. temperature difference

Q. Minerals absorbed by roots move to the leaf through:

1. Xylem
2. Phloem
3. Mesophyll cells
4. Stomata

Q. Explain in your own words with suitable examples.
Describe the transportation system in plants.

Q.

The process of digestion in humans is completed in:

1. Liver

2. Small intestine

3. Stomach

4. Pancreas

Q. What is the different between rootlet or root hair ??

Q. Choose the correct answer from the alternatives given in the brackets.
The xylem in the plants are responsible for ___________.
(transport of water, transport of food, transport of aminoacids, transport of oxygen)

Q. Water is transported in plants through ____________.

1. Stamen
2. Phloem
3. Epidermis
4. Xylem

Q. Answer the following.
(i) Name the vascular tissues labelled A and B.
(ii) What materials are transported through A?
(iii) What materials are transported through B?
(iv) How do the materials in A move upwards to the leaves?

Q. Which process is involved in the process of water absorption?

Q. When a cell is fully turgid which of the following will be zero?

1. Suction pressure
2. Osmotic pressure
3. Wall pressure
4. Turgor pressure

Q. Assertion :Water in liquid form reaches to plant surfaces in transpiration process. Reason: At plant surfaces water changes from liquid to vapour phase.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Mass flow hypothesis of Munch was elaborated by

1. Mason and Maskell
2. De Vries
3. None of the above
4. Crafts

Q. What facilitates the movement of water from soil to roots of plants?

1. Photosynthesis
2. Ion concentration gradient
3. Presence of root hairs
4. Using energy from ATP

Q. The plant undergoes wilting, when:

1. Xylem is blocked.
2. Cambium is blocked.
3. Phloem is blocked.
4. Some roots are reduced in number.

Q. The transport of water and minerals takes place through:

1. Sieve tubes
2. Phloem
3. Xylem
4. Sclerenchyma

Q. Following are the few definitions of osmosis. Read carefully and select the incorrect definition.

1. Movement of solute molecules from a lower concentration of water to a higher concentration of solution through a semipermeable membrane.
   
2. Movement of solvent molecules from lower solute concentration to higher solute concentration.
3. All of the above.
4. Movement of solute molecules from higher concentration to lower concentration of solution through a permeable membrane.

Q. Which of the following helps to move the water from root to xylem vessels?

1. Stem cells
2. Root cells
3. Soil
4. Both B and C

Q. Transpiration and root pressure cause water to rise in plants by

1. pushing it upward
2. pushing and pulling it, respectively
3. pulling it upward
4. pulling and pushing it, respectively

Q. Describe an activity to demonstrate the process of Osmosis.