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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
FIRST SEMESTER – APRIL 2008
ZO 1807 – PHYLOGENY OF INVERTEBRATA AND CHORDATA
Date : 28-04-08 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
PART – A Answer ALL (10 x 2 = 20 Marks)
- Give binomials of cat and camel
- Mention any four economically important reptiles.
- Write the dental formulae of rabbit and elephant
- Define Sericulture and Palaeontological question mark
- Write short notes on Cephalaspis
- Explain cephalization
- Write down any four important characteristics of the Phylum Phoronida
- Give four parasitic adaptations of Taenia and Mosquito
- Enumerate any four important characters of Hemichordates.
- Explain the following ductus caroticus and ductus cuiveri
PART – B Answer any FOUR (4 x 10 = 40 marks)
- Write notes on the Larval forms of Echinoderms
- Define adaptive radiation and Give an account of the Adaptive radiation in Marsupials.
- What are Pathogens? Explain in detail the Pathogen Entamoeba.
- What are pearl oysters and give an account on pearl culture.
- Explain metamerism and add a note on Metamerism in various groups of animals.
- Write notes on the corals and coral reefs.
PART – C Answer any TWO (2 x 20 = 40 marks)
- Write an essay on the origin, evolution and classification of Ostracoderms
- Compare and bring out the evolutionary significance of the respiratory systems of the major groups of invertebrates and chordates.
- Explain in detail the origin, ancestry and evolution of chordates with reference to Geological time scale.
- Explain in detail the Rotifers and bring out their systematic position.
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