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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
The process by which root hairs absorb water from the soil.
State whether the following statement is true or false. Rewrite the false statement correctly.
Water absorption mainly occurs through the root-hair.
Give reason for the following:
If you uproot a plant from the soil, its leaves soon wilt.
Choose the correct answer:
Which one is semi-permeable?
Study the experimental setup in the figure and then answer the question that follow.
What is meant by 'semipermeable membrane'?
The alongside diagram A shows a root hair growing through the soil particles. Diagram B is the root hair of an aquatic plant.
(i) Name the parts 1,2,3.
(ii) Name two substances which enter the root hair. What are their uses?
(iii) By what process do these substances enter the root hair?
(iv) Account for the different shapes of root hairs in the two diagrams.
Identify the zone in wbkh root hair occurs.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
Epiphytic plants like ____________ absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
