The number of bacteria on skin are -: (A) 10l- 102, (B) 102- 105, (C) 105-1010, (D) 1010
Answer is D. Ans. is 'd' i.e., >1010 It has been calculated that a human adult has about 1012 bacteria on the skin, 1010 in the mouth and 1014 in thegastrointestinal tract. ---------Textbook of bacteriology