B.Sc Corporate Embryology And Evolution Question Paper 2003

LOYOLA  COLLEGE (AUTONOMOUS), CHENNAI-600 034.

B.Sc. DEGREE  EXAMINATION   – zoology

fourth SEMESTER  – APRIL 2003

ZO 4500/ZOO 506 – embRyology and evolution      

11.04.2003

9.00 -12.00                                                                                                        Max : 100 Marks

 

 

SECTION – A                               (10 ´ 2 = 20  Marks)

Answer ALL questions

1. Define the term ‘vitellogenesis’.
2. What is spermiogenesis?
3. Comment on neural crest cells.
4. With one suitable example explain embryonic induction.
5. What do you mean by transgenic animals?
6. Differentiate organic evolution from inorganic evolution.
7. What are homologous organs? Give one example.
8. List any four vestigial organs in man
9. Comment on Mesozoic era.
10. Define the law of Adaptive Radiation.

 

            Section – B                                 (4 ´ 10 = 40 Marks)

Answer any FOUR questions.

 

11. Write notes on nuclear transplantation.
12. Categorise the eggs of chordates. Illustrate your answer.
13. What are fate maps? Explain the fate maps of frog and chick.
14. Explain the naturally available fossil records.
15. With suitable diagrams explain evolutionary convergence and parallelism.
16. Mention the contributions of any four 4 Neol

 

 

SECTION – C                                  (4 ´ 10 = 40 Marks)

answer any TWO questions.

 

17. Write an essay on fertilization and mention the theories on fertilization.
18. Explain the development of brain in vertebrates with illustrations.
19. Discuss the role of isolating mechanisms in speciation.
20. Trace evidences from physiology and biochemistry in favour of the theory of organic evolution.

 

 

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