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Question
The diagram below represents a layer of epidermal cells showing a fully grown root hair. Study the diagram and answer the questions that follow:
Mention one distinct difference between the parts labelled A and B.
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Solution
|
Cell wall |
Cell membrane |
|
The cell wall of a root hair is freely permeable and allows both salt and water to pass through. |
The cell membrane of a root hair is semi-permeable and does not allow large dissolved salt molecules to pass through. |
RELATED QUESTIONS
The process by which root hairs absorb water from the soil.
Match the items in column I with those in column II
| Column I | Column II | ||
| (a) | Xylem | (i) | semi - permeable |
| (b) | Phloem | (ii) | permeable |
| (c) | Cell membrane | (iii) | downward flow of sap |
| (d) | Root pressure | (iv) | upward flow of water |
| (e) | Cell wall | (v) | guttation |
Give reason for the following:
If you uproot a plant from the soil, its leaves soon wilt.
How is root hair adapted for the absorption of water from the soil?
Choose the correct answer:
Swelling of wooden doors during rains is caused by ___________
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.
A few RBC’s were kept in three test tubes containing isotonic, hypotonic and hypertonic solutions. What will be the expected observations after a few hours? Explain.
Give Technical Term for the following.
The tissue responsible for the ascent of sap in plants.
Name the following:
Unicellular outgrowths from the epidermis of roots.
