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81. By which the sex of a child is determined before birth?
  A.  Foetus of mother
  B.  spersms of father
  C.  Both 1 and 2
  D.  Nutrition of mother
     
   
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82. What may be the cause of malfunctioing of thyriod gland?
  A.  Iron deficiency
  B.  Iodine deficiency
  C.  Calcium deficiency
  D.  Vitamin C
     
   
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83. The element which is the most abundant in the human body is:
  A.  Iron
  B.  Carbon
  C.  oxygen
  D.  Nitrogen
     
   
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84. Night blindess results from the deficiency of:
  A.  Glucose
  B.  Vitamin E
  C.  Vitamin A
  D.  Vitamin B2
     
   
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85. How many feet has a crab got?
  A.  8
  B.  10
  C.  12
  D.  6
     
   
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86. Which one of the following is found only in women
  A.  Thyroid
  B.  Pituitary
  C.  Adenoid
  D.  Ovary
     
   
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87. Which one of the folloing is not a function of kidney?
  A.  Production of antibodies
  B.  Removal of metabolic wastes from the body
  C.  regulation of blood pH
  D.  Regulation of osmotic pressures of the blood
     
   
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88. Water in plants is transporteed by:
  A.  xylem
  B.  phloem
  C.  epidermis
  D.  cambium
     
   
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89. Where are Eucalyptus trees found in abundance?
  A.  Mizo Hills
  B.  Nilgiri Hills
  C.  Manipur Hills
  D.  Naga Hillls
     
   
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90. Which of the following hormone is released in excess quantity during excitement?
  A.  Cortisone
  B.  Serotonin
  C.  Adrenaline
  D.  Oestrogen
     
   
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