K.C.S.E Biology Q & A - MODEL 1995PP1QN11

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The diagram below represents a transverse section of a young stem

• ​(a)Name the parts  labeled A and B                                        (2 mks)
• (b)State the functions of the parts labeled C, D and E       (4 mks)
• (c)List three differences between the section shown  above and one that would  be obtained from the root of the same plant
  

                                                                                                               (3 mks)

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KNEC ANSWERS

• (a)
  
  • A – Epidermis
  • B – Pith
    
• (b)
  
  • C – Transport manufactured food / translation; Rej. Digested food
    
  • D – Produces  new cells/ divides to give new cells. Accept  secondary Thickening/ growth/ produces phloem  & xylem.
    
  • E- transport  minerals salts/ minerals/ salts alone
    
•  (c)
  
  • Xylem in central/ Star shaped
  • Phloem in arms of xylem
    
  • Root hairs present  in root / has pilferous layer
    
  • No pith in root