wbnsou.ac.in Post-Graduate Zoology Model Question Paper : Netaji Subhas Open University

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wbnsou.ac.in Post-Graduate Zoology Model Question Paper : Netaji Subhas Open University

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1 NSOU PG Zoology Model Question Paper

2 Structural Organization of Chordates & Non-Chordates

3 Taxonomy, Biodiversity and Conservation

4 Ecology, Environmental Biology & Toxicology

NSOU PG Zoology Model Question Paper

Paper – 1A :
Time : 2 Hours Full Marks : 50
Weightage of Marks : 80%

Related / Similar Question Paper : WBNSOU PG Social Work Question Paper

Special credit will be given for accuracy and relevance in the answer. Marks will be deducted for incorrect spelling, untidy work and illegible handwriting. The weightage for each question has been ndicated in the margin.

Structural Organization of Chordates & Non-Chordates

1. Answer two questions : 9 × 2 = 18
a) Discuss the modern concept of the origin of chordates with illustration. Draw and describe pharynx of Balanoglossus. 6 + 3
b) Classify Reptilia up to living orders with distinctive characters and examples. 9
c) Describe with illustration different types of jaw suspension in vertebrates. Draw and describe different modifications of gills for filter feeding in mollusca. 6 + 3
d) Describe with diagram the structure of different excretory apparatus in Annelida.Distinguish between excretion and osmoregulation. 6 + 3

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2. Answer three questions : 6 × 3 = 18
a) Distinguish between single-circuit heart and double-circuit heart in vertebrates. Discuss the functions of thrombocytes and platelets. 4 + 2
b) Name different dermal derivatives found in vertebrates. Draw and describe different types of scales in fish and mention at least one species of fish where the particular scale is available. 2 + 4
c) Describe the structure of a nephron of mammalian kidney. State composition of human urine. 4 + 2
d) Comment on the evolutionary significance of the trochophore larva of Annelida and bipinnaria larva of Echinodermata. 3 + 3
e) Draw and describe the process of conjugation in Paramoecium. 6
f) Describe with illustration two parasitic larval forms of invertebrates. 6

3. Answer two questions : 4 × 2 = 8
a) Which class of Echinodermata show filter feeding habit ? Describe the process with suitable diagram. 1 + 3
b) What is retrogressive metamorphosis ? Describe the phenomenon as it is found in Ascidia. 1 + 3
c) Draw, label and describe the air sacs in Columba. 4

d) Write short notes on the following : 2 × 2
i) Atrio-ventricular node ( A-V node )
ii) Jacobson’s organ.
4. Answer two questions : 3 × 2 = 6
a) Mention the organs where IXth and Xth
cranial nerves in a mammal are distributed. 12 1 × 2
b) What are the significant phenomena in the life history of Sacculina ? 3
c) Describe the lateral line system of fish and its function. 3
d) Write short notes on tricuspid and bisuspid valves. 1 2 1 × 2

Taxonomy, Biodiversity and Conservation

1. Answer two questions : 9 × 2 = 18
a) What is taxonomic character ? Elaborate the precautions that are necessary for selecting such characters. Discuss principal techniques for immunotaxonomy. 1 + 3 + 5
b) Distinguish between primary and secondary types. Name and define three primary and three secondary types. 3 + (3 + 3)
c) i) “Anthropogenic factors are responsible for species rarity which is followed by species extinction.” Discuss the phenomenon citing suitable examples. 5
ii) Write a brief note on the diversity clines in relation to biodiversity conservation. 4
d) What do you mean by direct and indirect census techniques ? Explain the procedures for Pug marking. Enumerate the main criticisms against the effectiveness of this technique. 2 + 5 + 2

2. Answer three questions : 6 × 3 = 18
a) Define Linnaean hierarchy. Name the categories introduced by Linnaeus. Distinguish between identification and classification. 1 + 2 + 3
b) Distinguish between synonymy and homonymy. Explain these phenomena citing one example for each of them. 3 + 3
c) Expand the term ‘ICZN’. What are the important requisites of a zoological name ? Explain ‘Law of priority’ citing one example.
d) Discuss the impact of prawn culture and sewage disposal practices on the degradation of mangroove ecosystem. 3 + 3
e) Present a comprehensive faunal make-up of desert biomes. Comment on the adaptations relating to collection and conservation of water of these animals. 2 + (2 + 2)
f) Enumerate the steps that have been taken in India on National and Regional basis for conservation of terrestrial faunal resources. 3 + 3

3. Answer two questions : 4 × 2 = 8
a) What is ‘Taxonomic key’ ? What are the purposes of constructing taxonomic keys ? What is a dicotomous key ? 1 + 2 + 1
b) Elaborate the importance of taxonomy in pest management. 4
c) Mention the characteristics of a tropical rain forest. State the distribution of such forest in India. 3 + 1
d) What is wildlife corridors ? State its importance in management andconservation of elephant in India. 1 + 3

4. Answer two questions : 3 × 2 = 6
a) Distinguish between panmictic andapomictic speciation. 3
b) State the endings of superfamily, family, subfamily and tribal names. What is a toto name ? 2 + 1
c) Distinguish between census and sampling. What is ‘Ecological sink’ ? 2 + 1
d) Explain why Manipur brow antlered deer should get conservation priority. 2 + 1

Ecology, Environmental Biology & Toxicology

Answer two questions : 9 × 2 = 18
a) Differentiate between deterministic and stochastic model of population growth. State exponential growth equation and explain how doubling time of population can be determined from this equation. 5 + 2 + 2
b) What is ROS ? State its physiological significance. Discuss enzymatic means of protection from ROS in animals. 2 + 2 + 5
c) Define ‘competition’ and classify it. What is competitive exclusion principle ? Elaborate with example. 3 + 2 + 4
d) Contrast resistance with resilience using suitable diagram and example. How do animals counteract temperature extremes ? 5 + 4

2. Answer three questions : 6 × 3 = 18
a) What do you mean by ‘Optimization of energy’ ? Differentiate between r and k selection. 2 + 4
b) Differentiate between eurythermal and stenothermal animals. Explain the effects of temperature on growth of animals with emphasis on “Bergman’s rule” and “Allen’s rule”. 2 + (2 + 2)
c) Give an outline concept of niche with special reference to ecological significance. 6
d) Discuss conflicts between parents and offsprings. 6

e) How is drinking water polluted by arsenic in some parts of West Bengal ? Comment on black foot disease. 4 + 2
f) Write a note on National Environment Policy, 2004. 6

3. Answer two questions : 4 × 2 = 8
a) Discuss evolution of parental care strategies among animals. 4
b) Describe fundamental concept of ecological model elucidating any one model studied by you. 4
c) What is circadian rhythm ? Explain with example. 2 + 2
d) Draw and describe three basic types of survivorship curve with example. 4

4. Answer two questions : 3 × 2 = 6
a) Explain different forms of mating system in animal kingdom. 3
b) What is life table ? Differentiate between static and dynamic life table. 1 + 2
c) What is photoperiodism ? Discuss its effects on animal. 1 + 2
d) Discuss molecular basis of combating stress in animals.

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