1. Name the product of the fusion of the ovum and spermatozoan         [ 1 mark ]
2.      List the four main stages of mitosis                                                   [ 4 marks]
3.      State the deficiency diseases for each of the following vitamins:

  This questions was  attempted by many candidates and their performance was fair.  In part (a) candidates correctly named the product of the fusion of the ovum and  spermatozoon.  In part (b) candidates correctly listed main stages of mitosis.  In part (c) candidates could not   state the deficiency diseases of the following vitamins; vitamin B1,B2, vitamin A, Vitamin C and Vitamin D.

Expected answers include:
8 (a)  Product  of fusion of the ovum and spermatozoon

• zygote/embryo

 
(b)      Stages of mitosis

• prophase
• metaphase
• anaphase
• telophase

(c)       Deficiency diseases of the following vitamins
           (i)    vitamin B1
                 -  beriberi
 
           (ii)   vitamins B2

• stomatitis/cracking of the skin around the mouth
• glossitis/inflammation of the tongue

 
          (iii)  vitamin C
                 -    scurvy                                                                  

         (iv)   vitamin A

                 -   night blindness /poor vision in dim light/keratomalaria       

        (v)     Deficiency disease vitamin  D