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5.	Which one among the following water-borne diseases is not caused by a bacteria?
	A.  Typhoid
	B.  Hepatitis A
	C.  Bacillary dysentery
	D.  Cholera

Answer

Ans: B Hepatitis A

6.	Which one among the following is the hardest part of our body?
	A.  Skull bones of head
	B.  Enamel of teeth
	C.  Thumb nails
	D.  Spinal vertebra

Answer

Ans: B Enamel of teeth

7.	Average life span of human R.B.C is
	A.  90 days
	B.  100 days
	C.  120 days
	D.  None of these

Answer

Ans: C 120 days

8.	Which one of the following is modification of parenchyma?
	A.  Fibres found in phloem
	B.  Tracheids
	C.  Vessel
	D.  Chlorenchyma

Answer

Ans: D Chlorenchyma