(Download) UPSC IAS Mains Optional Zoology (Paper -1 & Paper -2) Exam Paper - 2016

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(Download) UPSC IAS Mains Optional Zoology (Paper -1 & Paper -2) Exam Paper - 2016

Exam Name: UPSC IAS Mains

Year: 2016

Subject: Zoology

Zoology (Paper -1)
Section-A

1. Answer the following in about 150 words each: 10x5=50 marks

(a) Explain phenomenon of Torsion and detorsion in gastropods and also write their significance. 10 mark
(b) Define migration and its causes. Discuss the migration of Anadromous Catadromous fishes. 10 marks
(c) Give an account of mutable connective tissue. 10 marks
(d) Give an account of Conjugation in Paramecium and its significance. 10 marks
(e) Give an account of calcium homeostasis in mammals. 10 marks

2.(a) Explain various types of canal systems in Porifera. Also give their importance. 20 marks
(b) Give general characters of phylum platyhelminthes. Classify it giving the main features and examples of each class. 15 marks
(c) Give an account of Social behavior in Termites. 15 marks

3.(a) Draw labelled diagrams of basic echinoderm larval forms and describe their evolutionary importance. 20 marks
(b) Describe with the help of a suitable diagram, the major structures in the mammalian ear involved in hearing and balance. 15 marks
(c) Describe various hormones secreted by Pituitary gland and their role in humans. Also explain feedback mechanisms of hormonal regulation. 15 marks

4.(a) Give an account of Asexual and sexual life phases of Plasmodium vivax in their hosts. 20 marks
(b) Explain parental care in amphibians and its significance. 15 marks
(c) Define coclome Write the general features and examples of an acoelomate, a pseudocoelomate and acoelomate animal. 15 marks

SECTION-B

5. Answer the following in about 150 words each: 10x5=50 marks

(a) List different human-induced changes in the atmosphere. Describe greenhouse effect and its impact. 10 marks
(b) Write the principle, working and uses of spectrophotometer. 10 marks
(c) Define a pest. Describe the life cycle of Pyrilla perpusilla. Add notes on the damage caused by it and its control measures. 10 marks
(d) Describe kinship and altruistic behavior in animals. 10 marks
(e) What is correlation? Explain its various types and methods of calculating correlation analysis. 10 marks

6.(a) Define ecological succession. Differentiate between primary and secondary succession. Explain various steps involved in the mechanism of ccological succession. 20 marks
(b) Give an account of biological rhythms and discuss the mechanism of their regulation. 15 marks
(c) What is meant by Vermiculture ? Enlist various species suitable for vermiculture. Also explain techniques and importance of vermicomposting. 15 marks

7.(a) Enlist the various biomes of the biosphere and discuss the problems and adaptations of the animals of marine and desert biomes. 20 marks
(b) Define remote sensing. Explain how it can be used as an effective tool for sustainable development. 15 marks
(c) What is medical biotechnology? Discuss its role in human welfare. 15 marks

8.(a) With the help of suitable examples explain conditioning and imprinting in animals. 20 marks
(b) Describe the measures of central tendency and measures of dispersion. What is their use in biology ? 15 marks
(c) What is ELISA (enzyme linked immunosorbent assay)? Write its principle and procedure. Add a note on its applications. 15 marks