Zoology CSS Paper I 2012

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BS 17
UNDER THE FEDERAL GOVERNMENT, 2012
ZOOLOGY PAPER I
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE: (i) First attempt PART I (MCQs) on separate Answer Sheet which shall be taken back after 30 minutes.
(ii) Overwriting/cutting of the options / answers will not be given credit.

PART II
Section A

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.