2. Solved Papers
  3. AIIMS

AIIMS AIIMS Solved Paper-1999

  • question_answer
    In  Dryopieris,  the opening mechanism of sporangium is effectively operated by:

    A)  stalk                                     

    B)         stomium                            

    C)         annulus                              

    D)         peristome

    Correct Answer: B

    Solution :

    In Dryopteris, stomium is seen below the annulus and is gradually ruptured as the annulus dries out. It is astructure which help in opening of sporangium and dispersal of spores.


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