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An animal had the following teeth; on the upper jaw, no incisors, no canines, six premolars and six molars. On the lower jaw, 6 incisors, no canines, six premolars and six molars.

  1. Write down it’s dental formula. 
  2. Suggest the mode of nutrition of this animal
  3. Give a reason for your answer above. 
  4. State two adaptations of the animal whose dental formula you have written above.

5 Answers

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  1. I  0/0 , C 0/0, pm 3/3, m 3/
       
  2. Herbivorous.
  3.     
    • Lacks incisors on upper jaw.
    • Lacks canines on both jaws/ has diastema.
  4.  
    • Enamel open at the top crown to allow continuous growth.
    • Has diastema to create space for manipulation of food by tongue during chewing.
    • Presence of horny pad on upper jaw against which incisors on lower jaw cut off vegetation.
    • Jaws joined to allow sideways movement of the jaws during chewing.
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60
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Heterotrotrophism
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It has no upper incisors and canines
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It feeds on purely vegetations
It has a horny pad and a disstema
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