LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADV.ZOOLOGY
SECOND SEMESTER – APRIL 2011
AZ 2502/AZ 2500 - CHORDATA
Date : 08-04-2011
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART – A
(10x2=20 Marks)
Answer ALL Questions
Define / Explain the following:
1. Wheel organ
2. Paedomorphosis
3. Apoda
4. Neoteny
5. Amniota
6. Homeotherms
7. Synsacrum
8. Prototheria
9. Autostylic Jaw suspension
10. Craniata
PART – B
(4x10=40 Marks)
Answer any FOUR questions
11. Give brief note on mode of feeding in Amphioxus.
12. Why Balanoglossus has been included in Phylum chordate – Substantiate.
13. Describe arterial system of Shark.
14. Draw a neat diagram of brain of Calotes.
15. Write short note on flightless birds.
16. List out the salient features of aquatic mammals.
PART – C
(2x20=40 Marks)
Answer any TWO questions
17. Explain in detail the parental care in Amphibia.
18. Give an account of arcades and fossae of reptilian skull in classification of reptiles.
19. Write an essay on flight adaptations in birds.
20. Describe the types of placenta in mammals.
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