LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

TS 21

M.Sc. DEGREE EXAMINATION – ZOOLOGY

FIRST SEMESTER – APRIL 2007

ZO 1809 – ADVANCED EVOLUTIONARY BIOLOGY

 

 

Date & Time: 30/04/2007 / 1:00 – 4:00      Dept. No.                                       Max. : 100 Marks

 

 

 

Part A                                                 (Answer all)                           10 X 2 = 20

1. Comment on evolutionary constancy
2. Distinguish palingenetic and coenogenetic characters
3. What do you mean by ‘the survival of the fittest’?
4. Critically evaluate the ‘Big Bang Theory’
5. Explain transient polymorphism
6. Differentiate eugenics from euphenics
7. What are sibling species?
8. What are Robertsonian changes?
9. Define anagenesis
10. What is introgressive hybridization?

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

1. Explain the origin of eukaryotes
2. Trace the major events in mesozoic era
3. Assess the evolutionary significance of prospective adaptations
4. Evaluate the role of prezygotic isolating mechanisms
5. With suitable examples explain biochemical metamorphosis and biochemical recapitulation
6. Comment on the contributions of (a) Cuvier (B) Lamarck (c) Linnaeus and (d) Weismann

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

1. ‘Natural Selection operates in modern mankind’ – Justify
2. ‘Larval novelties may give rise to a new major line in evolution.’ Substantiate
3. Discuss in detail the evolutionary significance of animal colouration and mimicry
4. Write notes on (i) Nature of fossils and (ii) Evolutionary significance of gene mutation

 

 

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