ZOOLOGY

Paper I
iTime Allowed: Three HoursI IMaximum Marks: 200l
INSTRUCTIONS
Candidates should attempt questions 1 and 5 which are compulsory, and any THREE of the remaining questions selecting at least ONE question from each Section. The number of marks carried by each question is indicated at the end of the question. Answers must be written in ENGLISH. Suitable diagrams may be drawn, wherever required.

SECTION A
1. Write briefly on any four of the following in not more
than 150 words each

Polymorphism in Cnidarians 10

Parasitic aqaptation of Ascaris 10

Shell diversity in Mollusca 10

Aortic arches of tetrapods 10

Types of reptilian skull 10


2. Write an account on the affinities and systematic status of Hemichordata. 20
Describe the canal systems in sponges. 20

3. Give an account on the general features and life history of Asterias. 20
Describe the general features and life history of Fasciola and its relation to man. 20

4. Write elaborately on the flight adaptation(s) in birds.20
What is paedomorphosis?Write an account on the paedogenesis in Amphibia. 20

SECTION B

5. Write notes on any four of the following in not more than 150 words each
Social behaviour in primates 10

The role of pheromones in alarm spreading 10

Geiger -Muller counter 10

Flame photometry 10

Students' t-distribution 10


6. Outline the world distribution of the Tropical Rain Forest biome. Describe physico-biological characteristics and the fauna associated with the TRF biome. 40

7. What are the characteristics of 'instinct' and 'learning' Describe in detail various types of learning, with suitable examples. 20

Give an account on the world distribution, sources of infestation, life history and damage caused by Sitophilus oryzae. Suggest some measures for its prevention and control. 20

8. Describe regression and its various models. Add explanatory notes on properties, assumptions and computations for simple linear regression using biological data. 20
Discuss the theoretical basis of spectrophotometry with reference to the Beer-Lambert Law. Write an account on the construction and applications of a spectrophotometer. 20