B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
SECOND SEMESTER – APRIL 2012
Date : 16-04-2012
Time : 9:00 - 12:00
AZ 2502/AZ 2500 - CHORDATA
Dept. No. Max. : 100 Marks
PART – A (10 x 2 = 20 marks)
Answer ALL questions. All questions carry equal marks.
Define / Explain the following:
1.
Hatchek’s pit
6. Tortoise
2.
Endostyle
3.
Placoid scale
7. Pacemaker
8. Echolocation
4.
Apoda
5.
Amniota
9. Ductus botalli
10. Metanephros
PART – B (4 x 10 = 40 marks)
Answer any FOUR questions. All questions carry equal marks.
11. Write brief note on mode of feeding in Amphioxus.
12. Explain the retrogressive metamorphosis.
13. Explain the arterial system of shark.
14. Describe the poison apparatus and biting mechanism in snake.
15. Describe the flying mammals.
16. Explain the urinogenetal system of frog.
PART – C (2 x 20 = 40 marks)
Answer any TWO questions. All questions carry equal marks.
17. Discuss the parental care in Amphibia.
18. Give an account of classification of reptiles with emphasis on arcades and fossae of reptile skull.
19. Write an essay on flight adaptation in birds.
20. Describe the fate of aortic arches in chordates.
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