Zoology IFS Paper 1 UPSC 2021 with Solutions
In this article, all questions of Zoology Optional Paper 1 are answered. Click on the question links to view the answers.
This article is part of Synopsis IAS Zoology Optional Course for UPSC IFS.
Zoology Optional UPSC Forest Service Paper 1 2021
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SECTION-A
1. Write a brief account about each of the following:
Zoology 1(a) Nutrition and Osmoregulation in Euglena (IFS 2021/8 Marks)
Zoology 1(b) Torsion in Gastropoda (IFS 2021/8 Marks)
Zoology 1(c) Ambulacral system in Asterias (IFS 2021/8 Marks)
Zoology 1(d) Archaeopteryx (IFS 2021/8 Marks)
Zoology 1(e) Feeding mechanism of Branchiostoma (IFS 2021/8 Marks)
Zoology 2(a) Describe morphological structures of Peripatus and discuss its affinities. (IFS 2021/15 Marks)
Zoology 2(b) What is polymorphism? Explain different polymorphie forms in Coelenterates. (IFS 2021/15 Marks)
Zoology 2(c) Describe the life history of Taenia solium and its parasitic adaptation. (IFS 2021/10 Marks)
Zoology 3(a) Give a comparative account of the aortic arches in Vertebraten. (IFS 2021/15 Marks)
Zoology 3(b) Describe the larval forms of Crustacea with suitable diagrams. (IFS 2021/15 Marks)
Zoology 3(c) Describe the salient features of Prototheria. Explain how it is different. from Metatheria with example. (IFS 2021/10 Marks)
Zoology 4(a) Describe different patterns of fish migration and write about its significance. (IFS 2021/15 Marks)
Zoology 4(b) Give an account of chemical nature and function of Neurohypophyseal hormones in mammals. (IFS 2021/15 Marks)
Zoology 4(c) Describe the parental care in Amphibians with suitable examples. (IFS 2021/10 Marks)
SECTION B
5. Differentiate between the following:
Zoology 5(a) Indian major carps and Exotic carps (IFS 2021/8 Marks)
Zoology 5(b) Mean and Mode (IFS 2021/8 Marks)
Zoology 5(c) Natality and Mortality (IFS 2021/8 Marks)
Zoology 5(d) Navigation and Orientation behaviour in birds (IFS 2021/8 Marks)
Zoology 5(e) Hormones and Pheromones (IFS 2021/8 Marks)
Zoology 6(a) Write an account of the mission "Project Tiger" and mention the conservation strategies. (IFS 2021/15 Marks)
Zoology 6(b) What is the objective of courtship behaviour? Describe courtship in Drosophila and three-spined stickleback. (IFS 2021/15 Marks)
Zoology 6(c) What is phosphorus cycle? Describe the importance of phosphorus cycle as a component of Biogeochemical cycle. (IFS 2021/10 Marks)
Zoology 7(a) What are the different criteria for the selection of candidate species for aquaculture? (IFS 2021/15 Marks)
Zoology 7(b) What is the working principle of Transmission Electron Microscope (TEM)? Describe its application with suitable diagram. (IFS 2021/15 Marks)
Zoology 7(c) What is lac? Describe in detail about the lac culture. (IFS 2021/10 Marks)
Zoology 8(a) What are the common malaria causing species? Write an account of life cycle of malarial parasite and its pathogenicity in man. (IFS 2021/15 Marks)
Zoology 8(b) What are independent and dependent variables? What is coefficient of correlation and how is it calculated? Illustrate with formula and range of values (r). (IFS 2021/15 Marks)
Zoology 8(c) Write an account of Tiger Prawn culture with emphasis on seed resources and transportation. (IFS 2021/10 Marks)