CSS EXAM PAKISTAN ZOOLOGY 2012 PAST PAPER OLD PAPERS

Zoology Paper-1

Attempt only Four questions,selecting two questions from each section.All questions carry equal marks.

Part-2

Section-1

Q.2 (a) Define parasitism.what are parasitic adaptations in platyhelminthes?
(b) Discuss water circulating pathways in an ascon sponge, sycon sponge and leucon sponge.Illustrate answer with diagrams.

Q.3 (a)Describe parasitism in protozoa
(b)What are corals and coral reefs?What are different types of coral reefs?discuss.Give suitable diagrams.

Q.4 (a)Describe feeding in bivalves and mechanism of food movement in cephalopoda digestive tract.Does it differ (cephalopod)from other molluscs.
(b) Give an account of appendages and body divisions in crayfish.Give suitable diagrams.

Section-2

Q.5 (a)What are variations in vertebrate fishes,amphibians,reptiles,birds and mammals?Give diagrams.
(b) Describe pronephros, mesonephros and metanephros kidneys in vertebrates.Illustrate answer with diagrams.

Q.6 (a) Discuss with suitable diagrams Amniote aortic arches.
(b) Give description of primitive vertebrate heart and its diagram.

Q.7 (a)Describe Reflex arc and its action in mammalian spinal cord.Give diagrams.

Q.8 (a)Give a brief account of biting mechanism in snake.Give suitable diagrams.
(b) Illustrate answer with diagrams giving an account of different types of vertebrate eggs.