Advertisements
Advertisements
Question
What part is played by The cytoplasm in the uptake of water into the root hair?
Advertisements
Solution
The cytoplasm contains vacuoles having cell sap or solution of mineral salts. This cell sap being more concentrated than the soil solution help in water absorption by endosmosis.
APPEARS IN
RELATED QUESTIONS
The phenomenon of loss of water through a cut stem or injured part of plant is called ___________.
Choose the correct answer:
In ascent of sap water reaches upwards ____________
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
If the phloem of a twig is removed keeping the xylem intact, the leaves of a twig wilt.
The figure given below is a diagrammatic representation of a part of the cross-section of the root in the root hair zone. Study the same and then answer the questions that follow :
(i) Name the parts indicated by guidelines ‘1’ to ‘5’
(ii) Is the root hair cell unicellular or multi-cellular?
(iii) Draw a labeled diagram of the root hair cell as it would appear if some fertilizer is added to the soil close to it.
(iv) Name the process responsible for the entry of water molecules from the soil into A1 and then A2.
(v) What pressure is responsible for the movement of water in the direction indicated by arrows?
(vi) How is this pressure set up?
A thin strip of epidermal cells from the fleshy scales of an onion bulb was examined in a drop of water, under a microscope. All the epidermal cells looked alike and the figure alongside represents one of them. The thin strip was then transferred to a drop of strong sugar solution and re-examined under the microscope after about five minutes.
(i) Make a sketch of one of the epidermal cells, as it might appear after immersion in a strong sugar solution. Label any two parts which have undergone a change.
(ii) Give the scientific term for the change shown in Q.(i) above.
(iii) What would you do to bring this cell back to its original condition?
(iv) Give the scientific term used for the recovery of the cell as a result of the step taken in Q.(iii) above.
Give Technical Term for the following.
The tissue responsible for the ascent of sap in plants.
Root hair occurs in the zone of ____________.
Aquatic animals like fish excrete their wastes in gaseous form as ______.
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
Name the following:
Unicellular outgrowths from the epidermis of roots.
