LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

SUPPLEMENTARY SEMESTER EXAMINATION – JUN 2006

B.Sc. DEGREE EXAMINATION

                                              ZO 4500 – EMBRYOLOGY AND EVOLUTION

 

 

 

Date & Time : 28/06/2006/1.00 – 4.00          Dept. No.                                                       Max. : 100 Marks

­Part A                           (Answer All)                          10 × 2 = 20

1. Differentiate spermatogenesis from spermiogenesis.
2. Comment on fertilizin and antifertilizin
3. Write a note on neural crest cells.
4. What is erythroblastosis foetalis?
5. What do you mean by meroblastic cleavage.
6. Distinguish cannon bone from splint bone.
7. What are coprolites.
8. Comment on evolutionary constancy.
9. Give an example for each of the following adaptations

(a) Scansorial (b) Arboreal (c) Rectigrade (d) Cursorial.

10. List down any four vestigial organs in man.

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

11. Categorise, explain and illustrate the types of chordate eggs.
12. Describe morphogenetic movements.
13. Write notes on transgenic animals.
14. Explain the role of gene mutations in evolution.
15. Briefly discuss the contributions of Neo Lamarkians.
16. Tabulate the major events in the geological time scale.

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

17. Write an essay on placentation of mammals.
18. Describe the development of sponges.
19. Categorise isolating mechanisms and elucidate their importance in speciation.
20. Trace evidences from biochemistry and physiology in favour of theory of organic evolution.

 

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