LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
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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)
- Differentiate enterocoelic coelom from schizocoelic coelom.
- Give the dental formulae of rat, dog, squirrel and man.
- Comment on hydatid cyst.
- Define metamerism and cephalisation.
- Palaeospondylus is a paleontological question mark. Substantiate
- Planaria is immortal under the edge of the knife. Substantiate.
- Define the law of adaptive radiation.
- Write a short note on the structure and function of synsacrum.
- What is shell lac?
- Limulus is a living fossil. Justify.
Section-B
Answer any FOUR (4 x 10=40 Marks)
- Give an account of echinoderm larvae.
- Explain the structure and affinities of Pogonophora..
- Write an account on prawn culture.
- Write notes on migration in birds?
- Relate the structure and function of heart in vertebrates.
- Explain social life in termites.
Section-C
Answer any TWO (2 x 20=40 Marks)
- Write an essay on coral reefs and their significance
- Give an account of the economic importance of chordates.
- Explain the structural and functional modifications, and pathogenecity of any four
helminth parasites.
- (a) What are ostracoderms. (3)
(b) Explain in detail the origin, classification and evolution of Gnathostomata (17)
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