LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

GA 16

M.Sc. DEGREE EXAMINATION – ZOOLOGY

FIRST SEMESTER – November 2008

    ZO 1807 – PHYLOGENY OF INVERTEBRATA AND CHORDATA

 

 

 

Date : 04-11-08                 Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

Section-A

 

Answer All the questions                                                         (10 x 2=20 Marks)

1. Differentiate enterocoelic coelom from schizocoelic coelom.
2. Give the dental formulae of rat, dog, squirrel and man.
3. Comment on hydatid cyst.
4. Define metamerism and cephalisation.
5. Palaeospondylus is a paleontological question mark. Substantiate
6. Planaria is immortal under the edge of the knife. Substantiate.
7. Define the law of adaptive radiation.
8. Write a short note on the structure and function of synsacrum.
9. What is shell lac?
10. Limulus is a living fossil. Justify.

 

Section-B

Answer any FOUR                                                                         (4 x 10=40 Marks)

11. Give an account of echinoderm larvae.
12. Explain the structure and affinities of Pogonophora..
13. Write an account on prawn culture.
14. Write notes on migration in birds?
15. Relate the structure and function of heart in vertebrates.
16. Explain social life in termites.

Section-C

Answer any TWO                                                                           (2 x 20=40 Marks)

17. Write an essay on coral reefs and their significance
18. Give an account of the economic importance of chordates.
19. Explain the structural and functional modifications, and pathogenecity of any four

helminth parasites.

20. (a) What are ostracoderms. (3)

(b) Explain in detail the origin, classification and evolution of  Gnathostomata        (17)

 

 

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