LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034    M.Sc. DEGREE EXAMINATION – ZOOLOGY

AF 13

FIRST SEMESTER – NOV 2006

    ZO 1807 – PHYLOGENY OF INVERTEBRATA AND CHORDATA

 

 

Date & Time : 26-10-2006/1.00-4.00        Dept. No.                                                       Max. : 100 Marks

PART-A

Answer ALL.                                                                                                      (10×2=20 marks)

1. Give the dental formulae of the following animals.
2. Man b. Rabbit
3. Write the zoological names of the following animals.
4. Tiger 2. Camel          3. Rabbit         4. Peacock
5. Name the mouth parts of cockroach.
6. Distinguish adaptation and adaptive radiation.
7. What is palaeontological question mark?
8. Define the following.
9. polymorphism b. hermophroditism
10. metamerism d. cephalisation
11. Name any two larval forms of crustacea.
12. Name the diseases caused by
13. Leishmania
14. Trypanosoma
15. Give any two economic importance of invertebrates.
16. Mention any two affinities of pogonophora towards invertebrates and two towards

chordates.

Part-B

Answer any FIVE.                                                                                    (5×8=40 marks)

 

11. Write a comparative account of vertebrate hearts.
12. Give an account of regeneration in invertebrate and chordates.
13. Discuss in detail the affinities of cephalochordates.
14. Explain in detail the organ and the organ systems of the minor phylum chaetognatha.

and discuss its phylogeny.

15. Classify the class ostracoderm and elaborate the systematic position of the jawless

vertebrates.

16. Write a paragraph on apiculture.
17. Compare and contrast the respiratory system of invertebrates and chordates bringing

in the evolutionary significance.

Part-C

Answer any TWO.                                                                                   (2×20=40 marks)

 

18. a. Define a geological time scale
19. Frame charts to show the distribution of invertebrates and chordates
20. Explain the phylogenetic significance of the times scale.
21. a. Placoderms
22. Classify the placoderms
23. Explain the origin and evolution of jaws
24. a. Define Prawn culture
25. Explain the process of culture of fresh water prawns
26. Explain the process of culture of marine prawns
27. a. What is a parasite?
28. Mention the various diseases caused by the invertebrate parasites
29. Explain in detail the existence and multiplication of parasites in human body

 

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