Questions  

Match the following and choose the correct option.

	Column I (Organisms)		Column II (Site of exchange of gases)
A)	Planaria	i)	Gills
B)	Earthworms	ii)	Lungs
C)	Insects	iii)	Entire body surface
D)	Aquatic arthropods	iv)	Moist cuticle
		v)	Tracheal tubes

	A	B	C	D
1.	iii	i	iv	v
2.	i	iii	ii	iv
3.	iii	iv	v	i
4.	ii	iii	i	v

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