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ICSE Class 10 Answered

Given below are diagrams of plant cells as seen under the microscope after having been placed in two different solutions. (i) What is the technical term for the condition of:     1. Cell A   2. Cell B (ii) From the solutions given in brackets (water, strong sugar solution, 1% salt solution), name the solution into which     1. Cell A and 2. Cell B was placed before being viewed under the microscope. (iii) Under what conditions in the soil will the root hair cell resemble    1. Cell A and  2. Cell B? (iv) Name the pressure responsible for the movement of water from the root hair cell to the xylem of the root. How is it set up? (v) Name the pressure which helps in the movement of water up the xylem of the root.
Asked by Topperlearning User | 23 Jul, 2015, 12:00: PM
answered-by-expert Expert Answer

(i) 1- Turgid cell   2- Plasmolysed cell

(ii) 1- Water        2- 1% salt solution

(iii) 1- The root hair cell will resemble cell A when the soil is well watered.

      2- The root hair cell will resemble cell B when there is a high concentration of fertiliser in the soil and less water in it.

(iv) Root Pressure: Root pressure is responsible for the movement of water from the root hair cell to the xylem of the root. It is built up by endosmosis in the root hair cells and cell to cell osmosis in the cortex cells which push water into the xylem.

(v) Transpirational pull

Answered by | 23 Jul, 2015, 02:00: PM

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