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11.

Malpighian tubules in cockroach are used for:

A.	Respiration	B.	Excretion
C.	Enzyme secretion	D.	None of these

12.

Malpigman tubules of insects are:

A.	Excretory organs	B.	Respirtory organ
C.	Endocrine structures	D.	None of these

13.

Function of malpighian tubules in cockroach is:

A.	Respiration	B.	Excretion, osmoregulation and homeostasis
C.	Secretion of deigestive enzymes	D.	Storage of wastes

14.

Mandibles are not found in:

A.	Cockroach	B.	House-fly
C.	Spider	D.	Mosquito

15.

Chelicera are found in:

A.	Cockroach	B.	Scorpion
C.	Butter-fly	D.	None of these

16.

Two pairs of antennae are found in:

A.	Crustaceans	B.	Insects
C.	Myriapods	D.	Arachnids

17.

Single pair of antennae are found in:

A.	Insects	B.	Crustaceans
C.	Spider	D.	Scorpion

18.

Number of legs in insects is:

A.	One pair	B.	Two pairs
C.	Three pairs	D.	Four pairs

19.

Four pairs of legs are found in:

A.	Cockroach	B.	House-fly
C.	Spider	D.	None of these

20.

Complete metamorphosis occurs in:

A.	Moths and mosquitoes	B.	Grass-hopper
C.	Bed-bug	D.	Silver-fish