Paper : IFS - Indian Economic Service Zoology Previous Year Paper (I) (2003)

Paper-I : SECTION A
1. Write briefly on any four of the following in not more than 150 words each:
(a) Bilateral symmetry (10)
(b) Compare the brain of fish with that of mammal (10)
(c) Trochophore larva (10)
(d) Gonadal hormones in man (10)
(e) Structure and functions of uriniferous tubules (10)

2. (a) Discuss the affinities and phylogenetic considerations of Hemichordata. (20)
(b) Give the salient features of the phylum Annelida and classify the same up to classes citing distinguishing characters and examples. (20)

3. (a) Give a detailed account of reproduction in Protozoa. (20)
(b) Discuss the salient features and canal system in sponges. (20)

4. Describe with illustrations the structure and working of mammalian eye. (40)

SECTION B
5. Write notes on any four of the following in not more than 150 words each:
(a) Predator (10)
(b) Components of ecosystem (10)
(c) Sitophilus oryzae (10)
(d) Null hypothesis (10)
(e) Pollution and its impact on biosphere (10)

6. Give an account of natural resources, explain the importance of their conservation and discuss critically the present position of wild life conservation in India. (40)

7. (a) Discuss the role of insect vecors in spreading epidemics in man. Add a note on preventive measures. (20)
(b) Discuss the environmental cues that help in bird migration. (20)

8. (a) Describe the principles and applications of flame photometry. (20)
(b) What are the statistical parameters to be considered in designing laboratory and field experiments. (20)