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The diagram below represents a layer of epidermal cells showing a fullygrown root hair. Study the diagrami and answer the questions that follow :

(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 that 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 added near it.

1 Answer

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(i) A – Cell wall of root hair. 

B – Cell membrane of root hair 

C – Cytoplasm 

D – Nucleus 

(ii) The soil medium is hypotonic. So endosmosis occur due to which the root hair cell turns turgid. 

(iii)

A (Cell wall) B (Cell membrane)
is freely permeable is semi permeable

(iv) 

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