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प्रश्न
What part is played by The cytoplasm in the uptake of water into the root hair?
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उत्तर
The cytoplasm contains vacuoles having cell sap or solution of mineral salts. This cell sap being more concentrated than the soil solution help in water absorption by endosmosis.
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संबंधित प्रश्न
Differentiate between the following:
Guttation and bleeding
Choose the correct answer:
Which one is semi-permeable?
Root hairs become flaccid, when fertilizers are added to the moist soil around it. Explain.
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?
Give Technical Term for the following.
Phenomenon of absorption of water by surface attraction.
____________ regions are present in a typical root.
Epiphytic plants like ____________ absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
Epiphytic plants like orchids absorb water vapours from air with the help of ______ having special tissue called velamen.
Why and how does water enter continuously into the root xylem?
Paheli uprooted a rose plant from the soil. Most of the root tips, with root hairs, got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give reason for your answer.
