LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

AF 15

FIRST SEMESTER – NOV 2006

ZO 1809 – ADVANCED EVOLUTIONARY BIOLOGY

 

 

Date & Time : 31-10-2006/1.00-4.00    Dept. No.                                                       Max. : 100 Marks

 

 

PART A

(Answer all)                                                                                                10 x 2 = 20

1. Differentiate neoteny from paedogenesis
2. What is Darwinian fitness?
3. What are cannon and splint bones?
4. Comment on genetic inertia
5. Enumerate the evidences to prove the fact that the primitive atmosphere lacked free oxygen
6. Characterise the ‘Period of Reaction’ in the history of evolutionary thought
7. Antibiotics exert a strong evolutionary force’. Substantiate
8. What is atavism?
9. What are ichnofossils?
10. Comment on the first authentic hominid fossil from India

PART B

(Answer any four)                                                                                   4 x 10 = 40

1. Explain neolamarckism
2. Briefly describe the methodologies employed in dating the fossils
3. With suitable examples explain co-evolution
4. Elaborate the importance of numerical changes in chromosomes
5. Write notes on polymorphism and evolution
6. An organ is homologous with another because of what it is, not because of what it does. Substantiate

PART C

(Answer any two)                                                                                    2 x 20 = 40

1. The evolution of a trait through natural selection could be substituted by the evolution of a trait through social selection – Discuss
2. Categorise isolating mechanisms and discuss their role in speciation
3. Enumerate the recent concepts of recapitulation theory
4. Write notes on (i) hybrid speciation and (ii) Animal Colouration

 

 

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