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Question

Name the protective layers found over the radicle and plumule, respectively.  
  1. Testa and tegmen 
  2. Tegmen and coleoptile
  3. Coleorhiza and coleoptile 
  4. Coleoptile and Testa


Solution

The correct option is C Coleorhiza and coleoptile 
The coleoptile and coleorhiza are sheaths that enclose plumule and radicle of the monocot seed, respectively. This is a characteristic feature that is present in monocots. 

Seeds have a seed coat with two layers - outer testa and inner tegmen. The testa is thick and the tegmen is thin and membranous. Both layers develop from the outer and the inner layers (integuments) of the ovule.
 

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