LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 17

FIRST SEMESTER – APRIL 2006

                                                  ZO 1802 – PHYLOGENY OF CHORDATA

 

 

Date & Time : 25-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                     (Answer All)                          10 ´ 2 = 20

 

1. Distinguish progressive and retrogressive metamorphosis
2. Categorise the dentition in mammals.
3. Comment on palaeontological question mark.
4. Enumerate the evolutionary significance of seymouria.
5. Tabulate the major biological events of Mesozoic era.
6. Differentiate diastylic from autostylic jaw suspension.
7. What are ductus caroticus and ductus cuvieri?
8. With a suitable example explain living fossils?
9. Write down the binomial name of Peacock, lion, tiger and camel?
10. Comment on the structure and function of synsacrum.

 

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

11. Explain the parental care in amphibians.
12. Briefly explain the flight adaptations of birds.
13. Explain placentation in mammals.
14. Write an account on scales of fishes.
15. Give an account of the affinities of Hemichordates.
16. Write a note on the ventricles of brain.

 

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

17. Give an account on Ostracoderms.
18. Write an essay on migration of birds
19. Give an account on the vertebrate fauna of India.
20. Write an essay on the digestive system of vertebrates.

 

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