LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
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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
- List down the three primary characteristics of chordates.
- Give the binomial name of liver fluke and peacock.
- Categorise the dentition in mammals.
- Comment on age of fishes and reptiles.
- Enumerate the structure and function of scolex of Taenia.
- What do you mean by hermophroditism?
- Comment on hirudin.
- Evaluate the economic importance of tsetse fly.
- Define bigenetic law.
- Differentiate Companula hilari and pectin.
Part B (Answer any four) 4 X 10 = 40
- Briefly describe the life cycle of Plasmodium.
- Explain origin of earth.
- Categorise coelom.
- Explain the categories of animal association.
- Elucidate the affinities of Chaetognatha.
- Define the law of adaptive radiation. Explain the phenomenon with any suitable example.
Part C (Answer any two) 2 X 20 = 40
- ‘Hemichordates are biological oddity’ – Justify.
- Discuss the structure, functional modifications and pathogenicity of nematode parasites in man.
- Give an account of marsupials.
- Write notes on (1) Regeneration (2) Social life in insects.