(Download) UPSC (MAIN) EXAM:2018 ZOOLOGY (Paper 1)


(Download) CS (MAIN) EXAM:2018 ZOOLOGY (Paper 1)


SECTION ‘A’

Q1. Write notes on the following in about 150 words each: 10X5=50 marks

(a) Protostomes and Deuterostomes 10 marks
(b) Peripatus 10 marks
(c) Paedomorphosis 10 marks
(d) Status of Sphenodon 10 marks
(e) General characters of Cetaceans and Primates10 marks

Q2.(a) Describe the Integumentary derivatives in Mammals along with labelled diagrams.20 marks
(b) Give an account of the structure and life cycle of Wucheraria bancrofti. Add a note on the pathogenecity and control of the disease caused by this parasite. 15 marks
(c) What is retrogressive metamorphosis ? Give an illustrated account of this phenomenon in Herdmania. Also write a note on its affinities.15 marks

Q3.(a) Describe different larval forms of Echinoderms and comment on their evolutionary significance. 20 marks
(b) Explain HPA axis. Draw a transverse section of the Adrenal gland and descrībe the functions of its different hormones. 15 marks
(c) Give an illustrated account of the life cycle of Plasmodium vivax. 15 marks

Q4.(a) Give an illustrated account of different types of mouth parts in insects and write a note on their functional significance.20 marks
(b) Give an account of Migration in birds. Add a note on the problems faced by them during migration. 15 marks
(c) With the help of labelled diagrams only, explain the structure and different stages of the life cycle of Obelia (no description is required). With reference to Obelia, also explain the polymorphism and the status of metagenesis. 15 marks

UPSC Mains General Studies Study Kit

SECTION 'B'

Q5. Write notes on the following in about 150 words each: 10x5=50 marks

(a) Ozone layer depletion 10 marks
(b) Population dynamics 10 marks
(c) Endemism with reference to India 10 marks
(d) Habituation and Conditioning 10 marks
(e) PCR 10 marks

Q6.(a) What is ecological succession? Give an account of the causes, types and general process of ecological succession in nature. 20 marks
(b) What is eusocialism ? Describe this phenomenon with reference to Honey Bees.15 marks
(c) What is the systemic position of rice pest ? Give an account of its life cycle and the damage caused by this pest. Write a note on the measure for its prevention and control. 15 marks

Q7.(a) Give an account of sources, impacts and prevention of air pollution. Comment on Montreal and Kyoto protocol also.20 marks
(b) What is "Lac-culture" ? Explain the methodology employed in lac-culture. Also describe the uses of lac. 15 marks
(c) What is resolution of a microscope ? Comment on the principles of SEM and TEM. Describe the structure, working and applications of any one of the electron microscope in biology. 15 marks

Q8.(a) What is biological rhythm? Give an account of its types and characteristics. What is the role of different factors in their entrainment ? 20 marks
(b) What is Chi-square test ? Give a detailed account of the computation of Chi-square for tests of independence, homogeneity and goodness of fit using biological data.15 marks
(c) Describe the structure of the pathogen responsible for AIDS. How it is transmitted ? Also mention the pathogenesis and prevention of AIDS.15 marks

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UPSC Mains General Studies Study Kit