LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
SECOND SEMESTER – April 2009
UF 04
AZ 2502/AZ 2500 - CHORDATA
Date & Time: 23/04/2009 / 1:00 - 4:00
Dept. No.
Max. : 100 Marks
PART- A
(Answer all Questions)
1. List down any three chordate features.
10 X 2 = 20 Marks
2. What is Wheel organ?
3. Comment on Narcine.
4. Draw and label the placoid scale.
5. Distinguish Amniota from Anamniota.
6. What is ductus caroticus?
7. What is synsacrum?
8. What is atlas?
9. What is mesonephros?
10. Distinguish craniata from acraniata?
PART- B
(Answer any FOUR)
4 X 10 = 40 Marks
11. Write an account of the mode of feeding in Amphioxus.
12. Explain the arterial system of shark.
13. Describe the poison apparatus and biting mechanism in snakes.
14. Write short account on flying mammals.
15. Describe the fate of aortic arches at reptilian level.
16. Draw a neat labeled diagram of brain of calotes.
PART- C
(Answer any TWO)
2 X 20 = 40 Marks
17. Discuss the affinities and systematic position of hemichordata.
18. Describe the parental care in Amphibia.
19. Describe the flight adaptation in birds.
20. Give an account of placentation in mammals.
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