LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADV. ZOOLOGY & BIO-TECHNOLOGY

FIRST SEMESTER – APRIL 2006

                                                              AZ 1500 – INVERTEBRATA

(Also equivalent to ZO 1500)

Date & Time : 28-04-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 Part A                                    (Answer All)                          10 ´ 2 = 20

1. What is coelom?
2. Comment on histolysin
3. Mention the function of hirudin.
4. What is cyclosis?
5. What is hectocotylised arm?
6. What are dermal ossicles?
7. What is statocyst?
8. What is binomial nomenclature?
9. Define metamerism.
10. Comment on choanocyte.

Part B                                     (Answer any four)                 4 ´ 10 = 40

11. Explain the endoerythrocytic cycle.
12. Explain the life history of Ascaris.
13. Explain the cephalic appendages of prawn.
14. Describe the structure of Paramecium.
15. What are coral reefs? How it is formed? Explain.
16. Discuss the external characters of leech .

Part C                                     (Answer any two)                              2 ´ 20 = 40

17. Explain the phylogenetic significance of Peripatus.
18. With a suitable diagram explain the water vascular system in starfish and add a note on its function.
19. What is metagenesis? Explain with a suitable example.
20. Write an essay on reproduction in Protozoa.

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

FIRST SEMESTER – APRIL 2008

AZ 1500 / ZO 1500 – INVERTEBRATA

Date : 03/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

            PART – A

Answer ALL the questions                                                                            (10 x 2 = 20 marks)

1. Comment on Ink glands.
2. What are book lungs?
3. What is Ommatidium?
4. What are tube feet?
5. Draw the structure of Aristotles lantern.
6. Differentiate between Conjugation and Endomixis.
7. Give two external features of scorpion.
8. What are Coral reefs?
9. What is Radula and its functions?
10. Define living fossil.  Give any two examples.

PART – B

Answer any FOUR questions                                                                   (4 x 10 = 40 marks)

1. Describe the heteronereis phase.
2. Give an account of the larvae of echinodermata and their significance.
3. Describe the Cephalic appendages of Penaeus.
4. Give an account of the Canal system in sponges.
5. Give an account of the process of Conjugation in Paramoecium and its significance.
6. Describe the structures connected with parasitic adaptations in Taenia.

PART – C

Answer any TWO questions                                                                    (2 x 20 = 40 marks)

1. Write an essay on social life of insects.
2. Peripatus is the connecting link between Annelida and Arthropoda – Discuss.
3. Write an essay on Coral reefs.
4. Give a detailed account on the effects of Parasitism on host, giving suitable examples.

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