LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADV. ZOOLOGY & BIO-TECHNOLOGY

TS 4

SECOND SEMESTER – APRIL 2006

                                                                  AZ 2500 – CHORDATA

(Also equivalent to ZO 2500)

 

 

Date & Time : 24-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                     (Answer All)                          10 X 2 = 20

 

1. What are the characteristic features of chordates?
2. What is pecten?
3. Draw the labeled diagram of pelvic girdle of frog
4. Write notes on Ostrich.
5. Comment on hippocampus
6. Explain the wheel organ
7. Differentiate heterocercal and homocercal tail
8. What are lateral line sense organs?
9. Draw the labelled diagram of hyoid apparatus
10. What is Hatchek’s pit?

Part B                                     (Answer any four)                 4 X 10 = 40

 

11. Write notes on accessory respiratory organs in fishes.
12. Explain the distribution of cranial nerves of frog.
13. Give an account of jaw suspension in chordates
14. Write a note on parental care exhibited by amphibians
15. Explain flight adaptation in birds.
16. Explain arterial system of shark.

 

Part C                                     (Answer any two)                              2 X 20 = 40

17. Explain the structure and affinities of amphioxus.
18. Write notes on any four poisonous snakes with identification.
19. Write an account on the development of aortic arches in chordates.
20. Explain the different types of respiration in amphibians.

 

 

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