LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

       B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.

DE 4

SECOND SEMESTER – APRIL 2008

AZ 2500 – CHORDATA

 

 

 

Date : 23-04-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

Part – A

 

Answer all                                                                                                      10 x 2 = 20

Explain / Define

1. Urochordate
2. Placoide scale
3. Heterocercal tail
4. Amniota
5. Agnatha
6. Flightless birds
7. Marsupials
8. Autodiastylic jaw suspension
9. Aortic arches
10. Heterodont dentition.

 

Part – B

Answer any Four                                                                                          4 x 10 = 40

11. Write notes on the affinities of Amphioxus.
12. Explain the structure and function of Arterial system of shark.
13. Briefly write the classification of Reptilia
14. Describe the Poison apparatus & biting mechanism of snake.
15. Write short notes on Flight adaptations
16. Briefly write about Aortic arches of Birds and mammals.

 

Part – C

Answer any TWO                                                                                         2 x 20 = 40

17. Give an account of Parental care in Amphibia.
18. Describe the identification of Poisonous snakes and add a note on any two Poisonous snakes of south India.
19. Write an essay on Aquatic mammals.
20. Write an account on placentation in mammals.

 

 

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