The diagram shows a layer of epidermal cells showing a fully grown root hair. Answer the questions by seeing the diagram:
(i) Name the parts labelled A. B, C and D.
(ii) The root hair cell is in a turgid state. Name and explain the process which caused
this state.
(iii) Mention one distinct difference between the parts labelled A and B.
(iv) Draw a diagram of the above root hair cell as it would appear when a concentrated
solution of fertilisers is added near it.
(i) The different parts are :
A- Cell wall
B-Cell membrane
C - Epidermal cell
D-Nucleus
ii) The process is osmosis which causes the cell to become turgid.
Osmosis Is the movement of water molecules from a region of their high concentration to a region of their low concentration through a semi-permeable membrane.
(iii) Part A: Cell wall; Part B: Cell membrane
| Cell wall | Cell membrane |
| Freely permeable | Semi-permeable |
iv
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