Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
(i) See figure.
(ii) Plasmolysis.
(iii) We would immerse this cell into freshwater, i.e., hypotonic solution.
(iv) Deplasmolysis.
APPEARS IN
संबंधित प्रश्न
The process by which root hairs absorb water from the soil.
Correct the following statements by changing the underlined words:
Xylem transports starch from the leaves to all parts of the plant body
How does movement and absorption of water take place through the roots?
The below figure shows a root hair:
(i) Label the parts 1 to 4.
(ii) What is the role of part 4?
(iii) Why is the root hair one-celled?
(iv) What will happen to the root hair if some fertilizer is added to the soil near the root hair?
From which type of cells, root hair is originated
Trace the pathway followed by water molecules from the time it enters a plant root to the time it escapes into the atmosphere from a leaf.
Minerals cannot be passively absorbed by the roots.
____________ regions are present in a typical root.
Why and how does water enter continuously into the root xylem?
