2. Solved Papers
  3. AIIMS

AIIMS AIIMS Solved Paper-2009

  • question_answer
    Animals possess nerve networks or nervous systems to respond to their environment. But the single called Amoeba does not possesses any nerve cell, so, how it come to know whether a particle it encounters is a grain of sand and not its dinner ?

    A) By chemotaxis                  

    B) By skin                 

    C)        By hormones    

    D)        All of these

    Correct Answer: A

    Solution :

    Although the Ameba has no sense organs, it responds to chemical stimuli. It makes this determination by chemotaxis, a kind of chemical sense. This is the same response mechanism that our white blood use when they encounter and phagocyrize a pathogen.


You need to login to perform this action.
You will be redirected in 3 sec spinner