Paper : IFS - Indian Economic Service Zoology Previous Year Paper (I) (2005)

Paper-I : SECTION A
1. Write briefly on any four of the following in not more than 150 words each
(a) Radiata and its position in animal kingdom (10)
(b) Compare the heart of frog with that of bird (10)
(c) Formation of coral reefs (10)
(d) Thyroid and its hormone (10)
(e) Nematocysts—structure and mechanism of action. (10)

2. (a) Discuss the general characteristics of Peripatus and comment on its affinities. (20)
(b) Describe the salient features of phylum Mollusca and classify the same upto classes citing distinguishing characters and examples. (20)

3. (a) Give an account of the larval forms of Echinodermata and add a note on their significance. (20)
(b) Describe the general features and life history of Fasciola and add a note on its relation to man. (20)

4. Give an illustrative account of the organs, mechanism and physiology of respiration in fishes. (40)

SECTION B
5. Write notes on any four of the following in not more than 150 words each:
(a) Biological rhythms (10)
(b) Role of pheromones in alarm spreading (10)
(c) Cholera—its vector, pathogens and prevention (10)
(d) Chi square test (10)
(e) Integrated pest management. (10)

6. Describe the detail the ecological succession and add a note on its significance. (40)

7. (a) What is polymorphism? Explain this phenomenon with reference to termites and honey bees. Add a note on its significance. (20)
(b) Explain how Silk is cultured in India and add a note on its economic importance. (20)

8. (a) Give an account of the principles and working of the transmission electron microscopy. (20)
(b) Citing suitable examples explain how the measures of central tendency are applied in biostatistics. (20)