Give a diagrammatic key for the identification of non-poisonous and poisonous snakes.

Describe the digestive system of amphibians.

Mimicry used to evade predators.

 Subclass Holocephali.

Intromittent sexual organs of Amniotes.

Respiration in cyclostomes.

Discuss the genetic basis of animal behavior in chordates.

 Give a comparative account of the pituitary gland of amphibian and birds.

Write about migration in eels.

Explain the embryonic development of the cardiovascular system in chordates.

With the help of suitable diagrams give a comparative account of brain of jawed vertebrates.

Describe with the help of suitable diagrams the integument of primitive fishes.

Horns

Plantigrade locomotion

Marsupials

Homodont teeth

Synapsid skull

Mention at least four important affinities between Hemichordates and annelids.

Enumerate the uses of bryophytes as medicinal agents.

Explain the telome concept.