LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION –ADVANCED ZOOLOGY&BIOTECH.
TS 03
SECOND SEMESTER – APRIL 2007
AZ 2500/ZO 2500 - CHORDATA
Date & Time: 20/04/2007 / 1:00 - 4:00
Dept. No.
PART - A
Answer ALL the questions.
1. What is meant by velum?
2. Explain a hyoid apparatus.
3. Draw a labeled diagram of pelvic girdle of frog.
4. Give the dental formulae of squirrel and rabbit.
5. What is placoid scale?
6. What is the difference between cutaneous and buccal respiration.
7. Comment on Hippocampus.
8. Explain the heart of shark.
9. What are the divisions of truncus arteriosus.
10. What is wheel organ?
PART – B
Max. : 100 Marks
10 x 2 = 20 Marks
4 x 10 = 40 Marks
Answer any FOUR of the following
11. Discuss the parental care exhibited by fishes.
12. Write notes on flying mammals.
13. Explain retrogressive metamorphosis.
14 Explain pulmonary respiration of frog.
15 Write a note on jaw suspension.
16 Explain the poison apparatus of snake.
PART – C
Answer any TWO of the following
17. Write an essay on affinities of cephalochordates.
18. Write an essay on migration of birds.
19. Give an account of circulatory system in frog.
20. Write an essay on fate of aortic arches in chordates.
********
2 x 20 = 40 Marks