JKPSC KAS Mains 2022 Zoology Paper 1:
INSTRUCTIONS
Please read each of the following instructions carefully before attempting the paper.
(i) There are eight questions divided in two Sections and printed in English. Candidate has to attempt Five questions in All. Questions No. 1 and 5 are compulsory and out of the remaining, any Three are to be attempted choosing at least One question from each Section. The number of marks carried by a Question/Part is indicated against it. Answers must be written in English in Question-Cum-Answer (QCA) Booklet in the space provided.
(ii) Your answer should be precise and coherent.
(iii) If you encounter any typographical error, please read it as it appears in the text book.
(iv) Candidates are in their own interest advised to go through the general instructions on the back side of the title page of the Answer Script for strict adherence.
(v) No continuation sheets shall be provided to any candidate under any circumstances.
(vi) No blank page be left in between answer to various questions.
SECTION- A
1. Answer the following in about 150 words each:
(a) What is retrogressive metamorphosis? Explain with Herdmania as an example. (10)
(b) Describe PCR and its applications. (10)
(c) Polychaetes exhibit different modes of life adapted to their habits. Explain with examples. (10)
(d) Differentiate between hormones and pheromones. Explain their role in animal behavior and communication.
(e) What are ecotones? Are mangrove forests examples of ecotones? Justify. (10)
2. (a) What are the various modes of flight in birds? Explain the various flight adaptations in birds. (20)
(b) Describe the various density dependent and independent factors which affect the population growth? (15)
(c) Differentiate between classical and operant conditioning. Add a note on acquisition, extinction and spontaneous recovery. (15)
3. (a) Explain, with suitable examples, various ways by which the parental care is shown in amphibians. (20)
(b) Explain the adaptations that led to shift to terrestrial life in chordates. Comment on the interrelationship of reptilian groups. (15)
(c) Explain different types of in-situ and ex-situ conservation of wildlife with suitable examples. Add a note on Project Tiger. (15)
4. (a) Give an account on general affinities of Prototheria. How does the limb structure in mammals provide an evidence of divergent evolution? (20)
(b) Discuss Tuberculosis, its causative agents, diagnosis and treatment. (15)
(c) Trace the evolution of heart in various group of vertebrates with the help of diagrams. (15)
SECTION- B
5. Answer the following in about 150 words each.
(a) Enumerate the various parasitic adaptations of helminthes. (10)
(b) Exaplin canal system in sponges with suitable examples. (10)
(c) Differentiate between correlation and regression. (10)
(d) Explain, with examples, the concept and importance of gene therapy. (10)
(e) Describe torsion and detorsion in Gastropods. Add a note on their significance. (10)
6. (a) Give an account of fish locomotion, emphasizing on the role of muscles and fins. Explain how some fishes are able to fly. (20)
(b) What are biological rhythms? Discuss their significance and mechanism of regulation. (15)
(c) Give the systematic position and life cycle of an oil-seed insect pest. Add a note on the damage caused and its management. (15)
7. (a) Name any two digenetic protozoan pathogens and their vectors. Describe the life cycle of any one of these. Add a brief note on its pathogenicity and prophylaxis. (20)
(b) With the help of a diagram, describe Nitrogen cycle. Why is it key to Life? (15)
(c) What is greenhouse effect? Discuss its causes and consequences. (15)
8. (a) Enlist any five hard derivatives of vertebrate integumentary system. Explain various types of horns and antlers in mammals with examples and diagrams. (20)
(b) Give an account of sexual reproduction in Protozoa. Discuss its importance. (15)
(c) What is SDS-PAGE? Explain how protein fragments are separated and detected using this technique and its significance. (15)
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