Define the following terms:

Homocercal tail

Class Reptilia

Neoteny

Holostyly

Match the following:

Protochordata Myxine

Vertebra Bony fishes

Agnatha Amphibia

Osteichthyes Urochordata

Moist skin Backbone

Give one word for the following:

The centrum of vertebra which bears concavity at the anterior end is called

The sensory receptor for sound in the cochlea of ear is called organ of

Larva of lamprey is called

The pouched mammals are called

The depression in the pectoral girdle where the head of the humerus fits in, is called

The nutritive cells present in the seminiferous tubules of the testes are called

Describe the general characters of Division Teleostei.

Write a short note on Order Cetacea of Class Mammalia.

3. Draw a well labelled diagram of the mammalian ear and discuss the mechanism of hearing.

4. With the help of a suitable diagram describe the structure of gill. Write about the mechanism of respiration in the bony and cartilaginous fishes.

Draw the different types of feathers of birds.

Describe with the help of suitable diagrams, the urinary system in Cephalochordata.

List five important features of birds or amphibia.

6. Explain the various defense mechanisms in animals.

7. Draw a well labelled diagram of the ventral view of mammalian heart. How is single circuit circulation different from double circuit circulation?

8. Write short notes on any three of the following:

Thyroid gland

Echo-location in bats

Circardian Rythms in animals

General characters of Order Testudines (Chelonia) in Reptiles

Digestive system of Amphibians