LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

SUPPLEMENTARY SEMESTER EXAMINATION – JUN 2006

M.Sc. DEGREE EXAMINATION

                                                  ZO 1802 – PHYLOGENY OF CHORDATA

 

 

 

Date & Time : 27/06/2006/9.00 – 12.00        Dept. No.                                                       Max. : 100 Marks

 

Part – A

Answer ALL questions.                                                                                10 x 2 = 20

1. Write the dental formulae of the following: a) Rat   b) Squirrel
2. Give the zoological names of a) Rhesus monkey   b) Horned toad
3. What is a palaentological question mark?
4. Write short notes on cephalaspis.
5. Distinguish ductus caroticus from ductus cuiveri.
6. Give any two diagnostic features of cephalochordates.
7. Explain any two parental care in Amphibians.
8. Write short notes on Archaeopteryx.
9. What are flame cells.
10. Write the main branches of dorsal aorta.

Part – B

Answer any FOUR of the following.                                                           4 x 10 = 40

1. Describe briefly the cavities of Brain of frog and rat.
2. Give an account of the exoskeleton of birds.
3. Classify Indian fossils.
4. Describe the morphology of Amphioxus.
5. Give an account of affinities of urochordates.
6. Explain the origin and ancestry of amphibians.

Part – C

Answer ALL questions.                                                                                10 x 2 = 20

1. Write an essay on ostracoderms.
2. Give an account of origin, ancestry and evolution of birds.
3. Write in detail the ‘Migration of Birds’
4. Give an account of parental care in fishes.

 

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