Advertisements
Advertisements
Question
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?
Advertisements
Solution
(i) 1. Vacuole (containing cell sap)
2. Soil particles
3. Xylem vessel
4. Cortex cells
5. Vacuole in cortical cells
(ii) Root hair cell is unicellular
(iii) See diagram alongside.
(iv) Osmosis
(v) Osmotic pressure
(vi) This pressure is set up due to the difference in osmotic gradient.
RELATED QUESTIONS
Choose the correct answer:
An example of a selective permeable membrane is __________
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.
Mention whether the following statement is true (T) or false (F) and give an explanation in support of your answer.
Guttation in plants occurs maximum at midday.
Grapes shrink when immersed in a very strong sugar solution.” Explain.
Describe structure of root hair.
Outer layer of root hair is made up of ________.
From which type of cells, root hair is originated
Root hairs are ______
Identify the zone in wbkh root hair occurs.
