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प्रश्न
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.
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उत्तर
(i) 1-Nucleus. 2-Cell wall. 3-Cytoplasm of the root hair cell.
(ii) 1. Water: Carries minerals to the plant.
2. Minerals: They are needed for healthy plant growth.
(iii) Osmosis.
(iv) In the Fig. A, the root hair has to pass through the soil particles, and as such, they are not straight. In the Fig. B, the root hair has no obstruction in water, and as such it grows straight.
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संबंधित प्रश्न
Three plants (a), (b) and (c) were placed in beakers containing coloured water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant (b), while plant (c) was exposed to strong light.
(i) In which plant, (a), (b) or (c) would the water move up the fastest?
(ii) In which plant (a), (b) or (c), would the water move up slowly?
(iii) Why was the water covered with a layer of oil?
(iv) What is being investigated by this experiment?
Choose the correct answer:
Which tissue makes passage for ascent of sap?
Name the following:
Root hairs are the extension of which cells.
Name the following:
Name the process by which intact plants lose water in the form of droplets.
Multiple Choice Question:
Water will be absorbed by the root hairs when:
Epiphytic plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called ____________.
____________ regions are present in a typical root.
Root hair is a cytoplasmic extension of ______.
