LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 18

FIRST SEMESTER – APRIL 2006

                            ZO 1807 – PHYLOGENY OF INVERTEBRATA AND CHORDATA

 

 

Date & Time : 22-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

Part A                                     (Answer All)                          10 X 2 = 20

1. List down the three primary characteristics of chordates.
2. Give the binomial name of liver fluke and peacock.
3. Categorise the dentition in mammals.
4. Comment on age of fishes and reptiles.
5. Enumerate the structure and function of scolex of Taenia.
6. What do you mean by hermophroditism?
7. Comment on hirudin.
8. Evaluate the economic importance of tsetse fly.
9. Define bigenetic law.
10. Differentiate Companula hilari and pectin.

 

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

1.  Briefly describe the life cycle of Plasmodium.
2. Explain origin of earth.
3. Categorise coelom.
4. Explain the categories of animal association.
5.  Elucidate the affinities of Chaetognatha.
6.  Define the law of adaptive radiation. Explain the phenomenon with any suitable example.

 

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

1.  ‘Hemichordates are biological oddity’ – Justify.
2. Discuss the structure, functional modifications and pathogenicity of nematode parasites in man.
3. Give an account of marsupials.
4. Write notes on  (1) Regeneration    (2) Social life in insects.

 

 

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