Stratified epithelial cells have limited role in secreation . Justify their role in our skin 

5

(a)

Why are neurons called excitable cells ? Mention thge special features of the membrane of the neuron?

5

(a)

Differences Between Blatta orientalis (oriental cockroach) and peripalnata americana (Aamerican cockroach).  

5

(a)

Distinguish between a male cockroach and female cockroach.

5

(a)

Distinguish between a male frog and female frog.

5

(a)

Describe various types of epithelial tissues with the help of labelled diagrams.

5

(a)

Explain the alimentary canal of a pheretima with suitable diagram. Explain how the peculiar feeding habit of earthworm is helpful for humans.

5

(a)

Explain the morphology of an earthworm.

5

(a)

Explain morphology of cockroach.

5

(a)

Explain the reproductive system in cockroach with the help of suitable diagrams.

5

(a)