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प्रश्न
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?
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उत्तर
(i) 1. Nucleus
2. Vacuole
3. Cell wall
4. Cell membrane
(ii) Part 4 is the cell membrane. It is semi-permeable. It allows only water molecules to pass through it.
(iii) Because it is an extension of epiblema cell.
(iv) By the addition of fertilizer, root hair becomes flaccid, because water will move out of it as soil water becomes hypertonic.
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संबंधित प्रश्न
Correct the following statements by changing the underlined words:
Xylem transports starch from the leaves to all parts of the plant body
Multiple Choice Question:
Put a tick mark (✓) against the correct alternative in the following statement:
The root-hairs are suited for absorbing water from the soil because:
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.
Root hairs become flaccid, when fertilizers are added to the moist soil around it. Explain.
Draw a cross-section of root showing association of soil particles with root hairs.
Name the following:
The kind of cells that constitute the cortex of a root.
Outer layer of root hair is made up of ________.
How many regions are there in a typical root?
Root hair occurs in the zone of ____________.
Explain about the factors that affect water absorption.
