LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

TS 42

B.Sc.  DEGREE EXAMINATION – ZOOLOGY

SIXTH SEMESTER – APRIL 2007

Z 615 – ORGANIC EVALUTION

 

 

Date & Time: 26/04/2007 / 9:00 – 12:00        Dept. No.                                                     Max. : 100 Marks

 

 

 

 

 

Part A                                                 (Answer all)                           10 x 2 = 20

1. What are vestigial organs? Give two examples.
2. Define serial homology.
3. What are coprolites?
4. Name the biological realms of the world.
5. Define germ plasm theory.
6. What is allopatric speciation?
7. Comment on Mullerian mimicry.
8. State Biogenetic law.
9. Comment on Eohippus.
10. What do you mean by scansorial adaptation?

 

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

1. Explain Lamarckian principles.
2. Describe the concept of struggle for existence as explained by Darwin.
3. Explain sexual selection theory.
4. Write notes on animal colouration.
5. Comment on precipitin tests.
6. List down the summary of events in equine evolution.

 

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

1. Write an essay on speciation.
2. Discuss morphological evidences in favour of the theory of organic evolution.
3. Trace the chemical origin of life and explain the origin of Eukaryotes.
4. Illustrate the adaptive radiation in placental mammals.

 

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