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Question

Choose the correct combination with respect to teeth in humans:-
  1. Heterodont, thecodont, diphyodont
  2. Homodont, acrodont, diphyodont
  3. Homodont, thecodont, polyphyodont
  4. Heterodont, pleurodont, polyphyodont


Solution

The correct option is A Heterodont, thecodont, diphyodont
Based on different types of categories, teeth can be classified into various types. On the basis of structure and function they are classified as heterodont (different types of teeth found in humans and cheetah) and homodont (same type of teeth found in dolphins). 
Based on placement inside the jaw, they are classified as thecodont (teeth embedded in bony sockets found in humans and crocodile), pleurodont (teeth embedded in the lateral side of jaw bones found in reptiles) and acrodont (teeth embedded in the terminal part of jaw bone found in amphibians and fish). 
Based on appearance during lifetime, they can be classified as monophyodont (appear only once in life- last molar or wisdom teeth), diphyodont (appear twice in life- incisors, canines and molars) and polyphyodont (appear more than twice in life).
 

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