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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.
APPEARS IN
संबंधित प्रश्न
the exact location of the Lenticels
Draw a magnified view of the root-hair, and describe, how it helps in the absorption of water from the soil.
How does movement and absorption of water take place through the roots?
Choose the correct answer:
Swelling of wooden doors during rains is caused by ___________
Root hairs become flaccid, when fertilizers are added to the moist soil around it. Explain.
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.
Most plant cells and tissues constitutes _____ % water.
________ type of tissues are present in epiphytic roots.
Draw a neat and proportionate diagram of root hair and label mitochondria, nucleus and vacuole.
