Zoology IAS Paper 1 UPSC 2020 with Solutions

Zoology Paper 1 UPSC 2020 - Question Paper with Solutions 

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SECTION-A

1. Write notes on the following in about 150 words each:

Zoology 1a Gamontogamy in Monocystis. (IAS 2020/10 Marks)

Zoology 1b Skeleton in sponges. (IAS 2020/10 Marks)

Zoology 1c Describe different kinds of coral reefs on the basis of their formation. (IAS 2020/10 Marks)

Zoology 1d Write a note on general characters of Prototheria. (IAS 2020/10 Marks)

Zoology 1e Flight adaptations in birds. (IAS 2020/10 Marks)

Zoology 2a With the help of labelled diagrams, describe the mouth parts of house-fly, butter-fly and honey bee. (IAS 2020/20 Marks)

Zoology 2b With the help of suitable diagrams, describe the different stages of life cycle of Nereis. (IAS 2020/15 Marks)

Zoology 2c With the help of labelled diagrams, give an account of the larvae found in Asteroidea, nd in Ast Ophiuroidea and Holothuroidea. (IAS 2020/15 Marks)

Zoology 3a Describe the distribution, habits and habitat of Rhynchocephalia. Write a note on crocodilian and lacertilian characters of Sphenodon. (IAS 2020/20 Marks)

Zoology 3b Explain origin of Amphibia and classify Amphibia up to sub class with characters and examples. (IAS 2020/15 Marks)

Zoology 3c With the help of labelled diagrams only, explain the different larval stages in the life cycle of Fasciola hepatica (No description is required). (IAS 2020/15 Marks)

Zoology 4a Describe various accessory respiratory organs of fishes with examples. (IAS 2020/20 Marks)

Zoology 4b Describe the respiratory organs and mechanism of respiration in Unio. (IAS 2020/15 Marks)

Zoology 4c Give an account of aortic arches in reptiles, birds and mammals. (IAS 2020/15 Marks)

SECTION 'B'

5. Write notes on the following in about 150 words each:

Zoology 5a Division of biosphere. (IAS 2020/10 Marks)

Zoology 5b Give an account of biological rhythms. (IAS 2020/10 Marks)

Zoology 5c Phosphorus biogeochemical cycle. (IAS 2020/10 Marks)

Zoology 5d Transgenic animals. (IAS 2020/10 Marks)

Zoology 5e TEM. (IAS 2020/10 Marks)

Zoology 6a What are the uses of Biotechnology in Forensic science? (IAS 2020/20 Marks)

Zoology 6b Describe the uses of remote sensing in sustainable development. (IAS 2020/15 Marks)

Zoology 6c Explain the principle of spectrophotometer and describe its following components: (i) Radiation sources (IAS 2020/5 Marks), (ii) Phototube (IAS 2020/5 Marks), (iii) Prism (IAS 2020/5 Marks)

Zoology 7a Describe the names of any four diseases of silkworm and their causal agents (scientific names), sources of infection, symptoms and management. (IAS 2020/20 Marks)

Zoology 7b Describe the characteristics of social insects with examples. (IAS 2020/15 Marks)

Zoology 7c Describe chromosome painting and its versatility in modern diagnostics. (IAS 2020/15 Marks)

Zoology 8a Describe the differences between f-test and t-test. (IAS 2020/20 Marks)

Zoology 8b Describe the principle and applications of gel electrophoresis. (IAS 2020/15 Marks)

Zoology 8c Write scientific names of any three pests of stored grains and describe the nature of damage and management of Sitophilus oryzae. (IAS 2020/15 Marks)