LOYOLA  COLLEGE (AUTONOMOUS), CHENNAI-600 034.

M.Sc. DEGREE  EXAMINATION  – ZOOLOGY

first SEMESTER  – APRIL 2003

ZO 1801 / Z  720  phylogeny of invertebrata

04.04.2003

1.00 – 4.00                                                                                          Max: 100 Marks

 

 

SECTION – A                                         (10 ´ 2 = 20 Marks)

Answer ALL the questions.

 

1. What are the types of canal system found in sponges?
2. Differentiate plasma gel and plasma sol.
3. Define epimorphosis.
4. What is complete metamerism?
5. Define cephalization.
6. What are coral reefs?
7. Explain the term hermaphroditism.
8. Define mixotrophic nutrition.
9. What is avoiding reaction?
10. List out the different functions of cilia.

 

SECTION – B                                 (4 ´ 10 = 40 Marks)

 

Answer any four of the following.

 

11. Describe the phylogenetic tree of invertebrates.
12. Explain the theories of formation of pseudopodia.
13. Give an account of origin and Evolution of coelom.
14. Write down the Affinities of rotifera.
15. Explain polymorphism in coelenterates
16. Describe the histology of a sponges.

 

SECTION – C                                (2 ´ 20 = 40 Marks)

 

Answer any TWO of the following.

 

17. Write an essay on water vascular system in echinoderms.
18. Give an account of adaptive radiation in annelids.
19. Explain the origin of metazoa.
20. Discuss the importance of Acellular animals.

 

 

 

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